To avoid it, I'm not sure. But I'm thinking your idea to mod-correct it is probably the way to go.

How are those waves useless for you? Too easy? Not enough mobs?

I'm guessing the waves just take too long. It's a whole lot of waiting between quick kills, then suddenly you have to do stuff again when the War Titan spawns.

Originally posted by TOG | Phanjam:

To avoid it, I'm not sure. But I'm thinking your idea to mod-correct it is probably the way to go.

How are those waves useless for you? Too easy? Not enough mobs?

Yes I mean it's too easy because almost all of them are insta killed and there is a long delay between each series. It requires something like 8min to reach the last wave. Actually I'm tested all different builds to find the better ones so I need the tougher bosses in the game. Only the last wave in Tarroch's Tomb has lvl 196-199 bosses. I think the Ancient Titan lvl 198 is the most dangerous enemy in the whole game.
I tried using the console but I get only level 100 bosses. The Tarroch's Tomb bosses are not available.

If you want to try your hand at making a .MOD for it, you can try making custom SPAWNCLASS .DAT files for Tarrochs mobs from the vanilla files in the "...\Steam\steamapps\common\Torchlight II\MEDIA\SPAWNCLASSES" directory. Just look for the vanilla .DAT files starting with "TARROCH...". Clone those for use in your .MOD

Originally posted by TOG | Phanjam:

If you want to try your hand at making a .MOD for it, you can try making custom SPAWNCLASS .DAT files for Tarrochs mobs from the vanilla files in the "...\Steam\steamapps\common\Torchlight II\MEDIA\SPAWNCLASSES" directory. Just look for the vanilla .DAT files starting with "TARROCH...". Clone those for use in your .MOD

Yes I tried but I'm not an expert in creating mods. I just managed to add a town portal in the dungeon haha.