Ktahu will ALWAYS move away next round if you attack him on his blind spot. So, if you have units with very high initiative (I used Hayterants hatched from eggs) you can pretty much ensure he never attacks you, as long as you have this unit parked in the blind spot. He will summon new units every time he moves to the next spot, but that's all.

Not always, check it again.

In my games, even if i parked a unit at his blind spot, he can still does his mass attack.

Yeah it is a Dark Science. I only beat Ktahu with my heavy ranged team, no loss because my royal griffin barely hit his blind spot so he went running.

Yet, there were times when he would still do it. I really don't like fighting bosses. :) Haha.

I meant, when you hit him in the blind spot. As he'll retaliate, but not hit the unit that attacked him - I guess that is what makes him move. Just parking a unit there doesn't.

I killed him at second try with no-loss, after I figured out how this works. He only got one mass-attack off in the beginning.

I found Bhaal more problematic, as he does horrible mass damage, and there is no way to stop him, plus his retaliation is a killer. I killed him by only using 1 troop of around 325 Gorguls, then Phantoming the heck out of them. I could thus attack Bhaal by attacking the demons he summons in front of him- the Gorguls will damage Bhaal through them, and he cannot retaliate. PLus as a warrior, it was easier on Mana to time-back just one troop.

Naw; I've parked armies at the blind spot and hit him and he does not move every time. I'd much rather he moved than used other attacks (area, spawn) which he does fairly frequently when I am parked at the blind spot and hitting.

Nope, all retaliations, be it from boss or normal creatures never count as move.

When you hit k'tahu at blind spot, he retaliate but he still move, why? remember, he move first (before all of your units).

Hitting k'tahu at blind spot or just parking a unit there won't guarantee no mass attack at next round.

And remember that K'tahu can't switch position 2 times in a row, after he switch his position, it will be either mass attack or summoning or attacking units in front of him (only if you place 1 or more stack in front of his iron claw).

Baal mass attack is fire damage, fire resist items are plenty, just have 40 or 50 fire resistance is enough.

But baal sword throw attack is physical damage, indeed it has insane damage. Yet it can be avoided.

Baal sword throw only prioritize 3 units that is positioned adjacent to each other (unless there are no such condition, then it will be pure random), so make sure you have your unit never poisitioned like that (including you and Bill gilbert's).

Baal is much easier than k'tahu. For no loss win againts baal, i use the same setup againts k'tahu except i switch black dragon with green dragon. My paladin and green dragon attack baal head on, combined with stone skin and divine armor, and i also constantly phantom paladin (in case baal use sword throw, he will always hit paladin, paladin and green dragon), his damage and retaliation is pure joke (highest is less than 100 on green dragon and paladin), sword throw about 500 to both. Much much easier than k'tahu.