[FINISHED!!!] Ultimate Czar dragon boss fight

It should be the form n.5...

And there fits perfectly what i said about the use of the feature that makes you swap weapons and shields in battle

Your defence stats should be the highest possible, or he'll squash you with his attacks
Despite that, in that form casts almost always merton spell... that's a moment in which you can apply an otherwise useless strategy:
Except the one that wears the paladin shield almost for sure, why not swapping in battle the others shields with a flame shield? it's weak, but you can use his merton for keeping you at maximum HP, so you may finally concentrate on attacking him, in this case you should have a multi-jumper, or a multi-attacker, or Cyan with lv7 swordtech, or simply use quick to block his counter(that will work only till the 1.01 version in which Czar will counter even with quick active ).
There are many other ways to neutralize this form, anyway

PS. When he changes form, swap immediately flame shields with previous equip or you may regret it

Do you still believe that swapping weapons/shields in battle is an useless feature?