Its been a while since I last played the game, but I'll try to give this a shot:

Diggers are only dangerous on maps with earth. If the diggers would open up a path to your core, you can block their access to the earth blocks with barricades or place them in the moment the earth is destroyed. You can also use the ground pound trap to destroy earth yourself, without enemies immediately flooding the breach.

Battering Rams will always end your run, sooner or later. You can use the T3 "withering slime" upgrade of the slime trap, the burning gaze unique item and the T3 "shatter" upgrade of the freeze trap to deal %HP damage to them, but eventually they will outscale your traps.

In regards to XP, once you have finished a map and received XP for it, you can only receive more XP for it if you beat your previous XP record, which means you'll get diminishing returns on regular maps if your repeat them, even in endless mode.
You'll have to rely on ethereal maps to farm XP as each of them gives you full XP and vanishes afterwards. Their layout can be a mixed bag, but any map which has only a single pathway to defend can be a good one.

So, Battering Rams are big ♥♥♥ you and you can't do anything. Nice.

And diggers, yeah, I was talking about maps with earth. Without it they're pushovers, but on maps with earth sometimes it's difficult to even damage them.

Xp - do you know some levels good for grinding?

Originally posted by Wilku21:

So, Battering Rams are big ♥♥♥ you and you can't do anything. Nice.

Thats not what I said. I'm coming at it from the perspective of someone playing endless mode while you seem to have barely started the game, so my comment was too pessimistic.
You can perfectly stop battering rams for any normal play-through of every map. You just need enough damage.

Originally posted by Wilku21:

And diggers, yeah, I was talking about maps with earth. Without it they're pushovers, but on maps with earth sometimes it's difficult to even damage them.

Any specific maps you're having issues with?
In general, I'd say block the diggers from accessing dirt and they'll be harmless. But that depends on the map.

Originally posted by Wilku21:

Xp - do you know some levels good for grinding?

The maps you grind doesn't matter. Start with the maps you can beat, where you can funnel the enemies into one lane, then do the others. If you want to grind, you need to play every map.

Originally posted by omega:

Originally posted by Wilku21:

So, Battering Rams are big ♥♥♥ you and you can't do anything. Nice.

Thats not what I said. I'm coming at it from the perspective of someone playing endless mode while you seem to have barely started the game, so my comment was too pessimistic.
You can perfectly stop battering rams for any normal play-through of every map. You just need enough damage.

Originally posted by Wilku21:

And diggers, yeah, I was talking about maps with earth. Without it they're pushovers, but on maps with earth sometimes it's difficult to even damage them.

Any specific maps you're having issues with?
In general, I'd say block the diggers from accessing dirt and they'll be harmless. But that depends on the map.

Originally posted by Wilku21:

Xp - do you know some levels good for grinding?

The maps you grind doesn't matter. Start with the maps you can beat, where you can funnel the enemies into one lane, then do the others. If you want to grind, you need to play every map.

I dont play endless mode since I didn't unlocked it yet, so is there a way to actually destroy battering rams? I've been having problems with them. I can damage them but not destroy.
I forgot the name of the level with destroyable earth, but it is a square made out of dirt in the middle. I've beaten it but it was difficult.

One more question if I can ask - what's the best strat for Jungle Warriors? They often use their whip and sometimes dodge my traps.

Originally posted by Wilku21:

I dont play endless mode since I didn't unlocked it yet, so is there a way to actually destroy battering rams? I've been having problems with them. I can damage them but not destroy.

Hm, I don't recall when endless is unlocked, but I assume you only have the beginning traps?
When you put 15 gems into the dart trap, you can use the T1 upgrade that gives 1% damage for each kill, the T2 upgrade that does 30% more damage for each consecutive hit and the T3 upgrade that shoots 2 bolts.
As battering rams mostly appear during the end of the waves, you should be able to stack some damage on the dart traps beforehand.

Originally posted by Wilku21:

I forgot the name of the level with destroyable earth, but it is a square made out of dirt in the middle. I've beaten it but it was difficult.

Dirt Fort, I think. Yeah, that one sucks.
In most cases, avoid building wall traps on earth and try to predict where the miners will go when they spawn. As they seek out dirt, they have different paths from the other enemies, so you can prepare consumable traps in their path.

Originally posted by Wilku21:

One more question if I can ask - what's the best strat for Jungle Warriors? They often use their whip and sometimes dodge my traps.

They always try to use chasms to get closer to the core, but if I recall correctly, they only do so if their default path leads them next to one.
To prevent this, you can place a barricade either in front of the chasm or on the tiles they would jump to, but this depends on the map.

Another tip is try to set your defenses up at a later point of the map to catch them after they jump, even if this would weaken your defenses overall. If you can't, you can still set up their landing point using consumable traps or use a single wide area traps (such as a dart trap shooting down a corridor) to kill them quickly.

No, I don't have basic traps, I unlocked more. I think I'm almost lvl 30, or 20 something I dont remember.
And yes, I do have upgraded dart trap and I can buy lvl 3 upgrades for some traps. I'll try to use your path of upgrade and see how it'll work out.

Ok, so there is a way to combat their usage of whip. I will try to do something about it.