Kill order depends on group set up, if you don't have a BRD it can be better to kill the Blue then green. The meteorites are supposed to be eaten, if they are not gone when megaflare goes of it's a wipe, if you have meteorites when going from first to second golems you're going to have a hell safely placing those when dropping them. Single tank strat is possible but is a bit harder during golem phase but is definitely possible.