Helped someone with the Mythril golem today, the bombs take 2 maybe 3 Wide Volleys and don't seem to move at all for a time. You get more then enough time to kill them, you just need to make sure your keeping an eye out for them. They actually seem to be the main event in the fight and the golem is just there to try and distract you from killing them.

Did another map that had 3 2 legged lizards spawn(can't think of their names), decent amount of health and i think they insta cast petra. Neither me no the person i was with saw the last one cast it but him and our 2 chocobos were petra for a good 20 sec.