For Naila & Gau.

The hp boost was released during the stat balancing update last week. Last time, the highest hp was around 1mil only but now hp can easily go 2mil+.

So now, warrior is more viable and can survive longer while dealing insane dmg

But its still ok to have a tank as they are more tough and  able to tank with so so gears.  Unlike warrior,  u need to build their gear correctly and expected to spend millions  to upgrade their gear.  For starter,  get a tank like jane is ok..  Once u hit cap lvl,  u can consider to raise a warrior.