So i'm trying to set a temporary pve build for TMQ/UD/CC etc.. and I wonder if I should max Dragon's Will aka SK buff that increases aggro, is it any worth to have it maxed?

Nah

But get the aoe aggro skill. when you have the aggro skill maxed it increases the duration so you'll keep the aggro more and tank the damage instead of the other members.

yea I got that aoe aggro skill maxed, I was just wondering because sometimes I lost the aggro from bosses while doing TMQ/CC due to much higher dpsing from turtle/fighter/kidbuu, it was happening more often so I wish I could hold the aggro better without having to spam the aggro skills on bosses, anyway thx for answer.

@Jocer You suggest to have ex. self destruction wave and then dragon's will?
BTW: Is it worth to max great defense?

Dragon Will lvl 2 gives you more agro on every attack u do on the enemy, its a must have skill lvl 2 for a PvE build.

Together with AOE agro lvl 4, you're a good party member.

oh I see.. thanks for the info & advice.