Haris, Teostra is the easiest GQ 140. 90 sec. after he's in rage he will explode. When he charges, never attack him. When he attacks then you have plenty of time to attack on the opposite site. No Apex, no random jumps like Rajang. In a group where everyone knows what to do, it's no problem at all. I got top Relic weapons there (CB, DB, GS, IG).