Need help please

[szenhidrat]

So i thought i play this awesome game again this time tryin' to achieve zero losses. The regular mobs are easy but heroes give me a headache. On the first island i cleared everything but the heroes. No matter which i choose to fight they alwas cast some nice spells like poison skull, flame arrow or the cleaver thing. My poor inquisitors can only resurrect once so i don't know how to beat them with a flawless victory. I tried everything casting summon nature's call or using some thorns but they always target my 'real' army. Don't coming back with a stronger army could help because dot ticks will kill even more units and they would still kill form at least two stocks. I read a lot of great methods on the forum but i don't have target or invisibility or anything like that yet. Please help.