The black goblin resists every element. You have to use a non-elemental attack. Like the sky dragon and the purple girl knight I forget her name. Also the meteor
Acid, you aren't supposed to actually kill the epic yeti, you are supposed to get past him. But if you want to kill him, get all lvl 5, high damaging people, and wait until you have at least the 80 mana for ashield. Get your weretigers underneath him and keep doing berserk. That's how I did it at least. Rangers = bad though cause you invincible while under him.
By the way, it's melee that heals lord baal on epic. Just tested it. I think that the weretigers secondary attack does not, however, heal him. Best thing to do is get a whole bunch of rangers (elf snipers and the centaur people) and invulnerability as well as sylphs and your choice of othe rmosnetrs.
Either way, don't use titans. It helps if you don't. Replacing a titan with valkyrie or elf snipers or something yields far greater damage. As well as not hindering you with a really long spawn time and they are faster than titans. Btw, epic Baal heals on some attacks, I don't know which cause I had mage melee and range and 1 of them was healing
Yes! just killed epic yeti. Killing him gets you 200,000 in loot. I forget what not killing him got, but it's 300,000 total. Trick to actually killing him (if any of you want) is to get valkyrie and weretigers underneath him. Keeping the rest of your allies coming. He'll turn back at half health and be a non-threat at all. Once you get monsters under him with an invulnerability, just keep up berserk. It takes a while to kill him but it's satisfying.
oh, forgot to add if you are doing a non-boss lvl epic just blitzkrieg the whole thing. Don't use titans, you can get them done in like a minute each. don't even wait for another ally besides your heroes to spawn. When the vengeance waves come, hit invulnerability and you good for the last bit of the castle's health.