In order to make this guide easier to read, i've tried to list the quest in the same order as they are available in game and i've formated them as follows:

• main quests - quests that cannot be skipped
  
• side quests - quests that are optional
  
• tower defence - tower defence missions

The total amount of permanent attribute points available for doing all the quests listed here is
98 ability points and 37 skill points.

Please let me know if there are any errors in my list and i'll correct it.

1. Gorgon Pass - 450xp
   
2. The mayor - 2000gold, 600xp
   
3. The romany curse - 1000gold, 600xp, 1 ability point
   
4. Living ghost - 1000gold, 200xp
   
5. The merchant - 1000gold, 400xp
   
6. The Scarecrow - 1000gold, 400xp, 1 ability point, 1 skill point
   
7. Journey to the Ink - 1000gold, 500xp
   
8. The ancient inkgate - 2000gold, 600xp
   
9. Rusalka ambush - 1000gold, 1000xp
   
10. Salvage mission - 500 gold, 300xp
    
11. Lurking hunter-machines - 1500 gold, 2000xp
    
12. The frog statue - 2000gold, 2000xp, 1 ability point
    
13. The blacksmith's request - 1000gold, 1000xp
    
14. The Priest's lost relic - 2000gold, 2000xp
    
15. Spirit of the forest - 1500gold, 1000xp, 2 ability points, 1 skill point
    
16. The Drillworm - 2000gold, 800xp
    
17. Through the tunnels - 2000xp, 1 ability point, 1 skill point

• there are 4 bone relics (drops from bosses in Gallowsbog) which can be offered to the gluttoner idol for 2 ability points each, for a total of 8 ability points.

The total amount of points available in this chapter is 14 ability points and 3 skill points.

1. Find the lair - 5000gold, 5000xp, 2 ability points
   
2. Start the generator - 1000gold, 1000xp, 1 skill point
   
3. TD - Protect the lair - 1000gold, 1000xp
   
4. The gas projector - 2000gold, 3500xp
   
5. The ritual - 2000gold, 5000xp
   
6. Clean water - 2000gold, 5000xp, 1 ability point
   
7. The dark alchemist - 2000gold, 2500xp
   
8. Roaming monsters - 2000gold, 5000xp
   
9. Dastardly deeds - 5000gold, 2000xp
   
10. The assistant - 4000gold, 5000xp
    
11. The beggar king - 1000gold, 1 ability point, 1 skill point
    
12. Lost in the Ink - 2000gold, 4000xp
    
13. Hidden treasure - 2000gold, 2000xp
    
14. The swamp lillies - 2000gold, 2000xp, 6 ability points
    
15. The weapon shipment - 5000gold, 5000xp
    
16. Gentleman Rivalry - 4000gold, 4000xp
    
17. New war machines - 4000gold, 5000xp
    
18. Fulmigati's general - 2000 gold, 2000xp, 1 skill point

• there are 3 bone relics (drops from monsters in the Lost Place) which can be offered to the gluttoner idol for 2 ability points each, for a total of 6 ability points
  
• at the end of the The swamp lillies quest, one of the reward dialog is 6 ability points (arguably, the most powerful and flexible option)
  
• at the end of The assistant quest, one reward dialog is 5 ability points (the rest of the dialog options are available after he is in the lair).

The total amount of points available in this chapter is 22 ability points and 3 skill points.

1. Deserted Streets - 7000gold, 2000xp, 2 ability points
   
2. Rogue hunter-machines - 10000gold, 9000xp, 2 ability points
   
3. Surrounded Resistance Soldiers - 8000gold, 7000xp
   
4. A Dark ritual - 5000gold, 10000xp
   
5. The Inventor - 2000gold, 2000xp
   
6. The Lightning Traps - 4000gold, 5000xp
   
7. TD - The Ink is Coming - 5000gold, 5000xp
   
8. The Palace of Machines - 5000gold, 8000xp, 2 ability points
   
9. Fulmigati Himself - 20000 gold, 10000xp, 2 ability points, 2 skill points

The total amount of points available in this chapter is 8 ability points and 2 skill points.

1. Beneath the Palace - 10000xp
   
2. Clear out Viaduct Junction - 7000gold, 8000xp
   
3. The Siege - 7000gold, 10000xp, 2 ability points
   
4. The first wave - 2000gold, 2000xp
   
5. Troubles of the first line - 2500gold, 5000xp
   
6. Ornithopter Control Station - 6000gold, 6000xp
   
7. The phlogiston plant - 10000gold, 2000xp
   
8. The second wave - 2500gold, 2500xp
   
9. Vlados in trouble - 5000gold, 2000xp, 1 ability point
   
10. Evacuating the injured - 2000gold, 2000xp
    
11. Weapon supplies - 2000gold, 2000xp
    
12. Saving Private Bryan - 5000 gold, 5000xp, 1 ability point, 1 skill point
    
13. Octopod Annihilator - 25000gold, 10000xp
    
14. The prisoner - 5000gold, 5000xp
    
15. Prisoners - 3000gold, 10000xp
    
16. TD - The Subterranean Incursion - 5000gold, 5000xp
    
17. Resistance Elite - 2000gold, 4000xp, 1 skill point
    
18. Power of Perun - Part 1 - 7000gold, 8000xp
    
19. Children of Evil - 1000gold, 10000xp
    
20. The Black Idol - 1000gold, 10000xp
    
21. Ancient clock - 2000gold, 8000xp, 1 skill point
    
22. Power of Perun - Part 2 - 10000xp, 1 ability point, 1 skill point
    
23. TD - Invasion of the Rat-Things - 10000gold, 2000xp
    
24. The curse - 10000gold, 10000xp
    
25. Free the merchant - 5000gold, 5000xp
    
26. Gate of Perun - 5000gold, 5000xp
    
27. Power of Perun - Part 3 - 10000gold, 10000xp

The total amount of points available in this chapter is 6 ability points and 4 skill points.

1. Legend of the Chimera - 20000xp, 1 skill point
   
2. TD - The Inhuman Regiment - 10000gold, 10000xp
   
3. Counter-offensive - 5000gold, 4000xp
   
4. Enemy outpost - 2000gold, 4000xp
   
5. Enemy Strongpoint - 2000gold, 5000xp
   
6. The Artillery - 20000gold, 20000xp
   
7. The Railway Gun - 10000gold, 10000xp
   
8. Ornithopter Control Tower - 2000gold, 3000xp
   
9. Bounty hunting - 10000gold, 5000xp
   
10. The Foundry - 10000gold, 10000xp, 2 ability points
    
11. Manual of Practical Runes - 10000gold, 10000xp
    
12. Strong enemies - 10000gold, 10000xp
    
13. The Secret weapon - 10000gold, 20000xp
    
14. Goliath - 15000gold, 25000xp, 2 ability points, 2 skill points

The total amount of points available in this chapter is 4 ability points and 3 skill points.

1. Beginning of the End - 5000gold, 10000xp
   
2. TD - Caverns of Steel - 10000gold, 10000xp, 1 ability point
   
3. The Elite Guard - 8000xp
   
4. Annihilator Squadron - 8000xp
   
5. Off the beaten track - 10000gold, 15000xp, 1 skill point
   
6. Hex Poles - 10000gold, 10000xp, 1 ability point, 1 skill point
   
7. Kings and Queens of Wormwood Chasm - 10000gold, 10000xp, 2 ability points, 1 skill point
   
8. The Final Confrontation - 50000gold, 50000xp, 3 ability points

The total amount of points available in this chapter is 7 ability points and 3 skill points.

1. Deserted village - 20000gold
   
2. The Pied Piper - 10000, 10000xp
   
3. Island of Bones - 20000gold
   
4. Inkheart Mines - 25000gold, 20000xp
   
5. Rustblight - 10000gold, 10000xp
   
6. Rustheart - 20000gold
   
7. Crystal Bastion - 25000gold, 25000xp, 1 ability point

The total amount of points available in this chapter is 1 ability point.

1. Testing Facility - 10000gold, 10000xp
   
2. Minds in turmoil - 10000gold, 15000xp
   
3. The imprisoned vampire - 10000gold, 13000xp, 2 ability points
   
4. Strange inmates - 10000xp, 2 ability points
   
5. TD - The undead horde - 10000gold, 10000xp, 2 ability points, 1 skill point
   
6. Haunted Forest - 10000gold, 11000xp, 2 ability points
   
7. The curse - 15000gold, 20000xp, 1 skill point
   
8. Outlaw in distress - 15000gold, 5000xp
   
9. Stranded ghosts - 10000gold, 10000xp, 1 ability point
   
10. The lost village - 15000gold, 15000xp
    
11. Clear out the village - 15000gold, 10000xp
    
12. A wonderful stew - 15000xp, 1 skill point
    
13. Through the woods - 15000gold, 15000xp
    
14. More Inkgrubs - 10000xp, 2 ability points, 1 skill point
    
15. The hideout - 15000gold, 15000xp, 2 ability points, 2 skill points

The total amount of points available in this chapter is 13 ability points and 6 skill points.

1. Vampire invasion - 15000gold, 15000xp, 2 ability points
   
2. In the nick of time - 10000gold, 10000xp
   
3. The saboteur - 5000gold, 15000xp
   
4. Dark Carnival - 15000gold, 15000xp
   
5. Wretched Mirror - 20000gold, 20000xp, 2 ability points, 1 skill point
   
6. The Valley of Death - 15000gold, 15000xp
   
7. Ghosts and Ghouls - 15000gold, 15000xp
   
8. Feud beyond the grave - 5000gold, 5000xp
   
9. The Ascension - 5000gold, 13000xp, 1 ability point
   
10. Hidden pathways - 5000gold, 5000xp, 1 skill point
    
11. Agent of the Faceless Tsar - 15000gold, 15000xp, 2 ability points, 1 skill point

The total amount of points available in this chapter is 7 ability points and 3 skill points.

1. Spectral Provinces - 5000gold, 15000xp
   
2. Paper Trail - 15000gold, 15000xp
   
3. Quiz for life or death - 11000gold, 11000xp
   
4. Cold Feet - 10000gold, 11000xp
   
5. Supply run - 10000gold, 10000xp
   
6. The Dreamer - 15000gold, 15000xp, 2 ability points, 2 skill points
   
7. Power of nightmares - 15000gold, 25000xp, 1 skill point
   
8. Castle Glass - 10000gold, 10000xp, 2 ability points
   
9. TD - The Empyrean Perimeter - 15000gold, 15000xp, 1 skill point
   
10. Soul Shelter - 15000gold, 15000xp, 2 ability points
    
11. Improbability Flux - 15000gold, 15000xp
    
12. Koschei's Death - 5000gold, 10000xp, 1 skill point

The total amount of points available in this chapter is 6 ability points and 5 skill points.

1. The Gatekeeper - 15000gold, 15000xp, 5 ability points
   
2. Titanslayer relic - 25000gold, 25000xp, 1 skill point
   
3. Flesh of Titans - 5000gold, 10000xp
   
4. Tower of Torment - 15000gold, 15000xp, 1 ability point, 1 skill point
   
5. TD - Battle in the Ink - 15000gold, 15000xp, 2 ability points, 1 skill point
   
6. The fall of the Faceless One - 100000gold, 25000xp, 2 ability points, 2 skill points

The total amount of points available in this chapter is 10 ability points and 5 skill points.