My thoughts ON Chakax from a review of special characters I added what I found (note: this is what I found by using him; others would obviously think different).
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Chakax
Strengths: cool model, strong, goes first, 1 of the most powerful overall heroes in the game, can defeat most heroes, has a ward save that many heroes do not, grants look out sir reroll
Weaknesses doesn't do what he is supposed too (see below), cost expensive (see below), must challenge (there are times when you'd not want to do that), only useful in a temple guard/slann unit and which point, the unit is VERY expensive
Comments: I will rate him from my several times of using him... he isn't good enough. THe issue is, everyone knows how good/powerful he is. Due to that, no one who has even 40% of skill, will charge that unit with a hero. Every game i've played, i've had ogre tyrant lords, chaos lords, elves on dragons, etc all charging that unit to kill him and do as much damage as possible. The issue I see, is lords have better equipment than he does, yet lords are what he will be facing most of the time. He isn't a good enough bodyguard for that. What he needs, IMHO to make him worth taking and cool, is his weapon needs to act like a nullstone vs ALL enemy magic items (Not just weapons). That way he can nullifys ome of the stuff that makes lords so tough. For example, archaon, a lord on a dragon, settra, etc would still probably kill him BUT he has a better chance at least if he can get rid of the enemies items that give them better ward saves, etc. The way he is now..he always dies to a lord. I gave up on him since in every game i've used him, once he did 2 wounds to an enemy...every other time..he has done 1 or died without getting past the enemy's ridiculous armour save, or ward save, etc. If he was cheaper and got rid of some of his abilities, he wouldn't be useful at all for what his purpose is....He's already the most expensive hero special character and possibly even taking into account regular heroes with items (he is more costly than a nurgle hero). Making him a bit more costly but making him infinitely more useful would have been better.
Effectiveness: As above..5/10. He is good against heroes, and units with no characters, but useless against any semblance of a smart opponent or tougher armies (in terms of their characters) (chaos, demons, vampires, ogres, etc)
Point Effectiveness: I put 5/10 since my view is he needs to be made better...not worse and cheaper... since I don't view many to use him if he is cheaper and has less powers, BUT if he was better, at least some would use him...
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Sanjay