There isn't any particular way to feed the golems, each golem can eat up to 3 meteors, on the 4th one they'll grow bigger and wipe the raid. With the 10% you can feed them Asap without risking any death imo. Also if your DPS is good and you want to take time to feed them you can split your dps after green is down, to be sure every meteors are eaten and there isn't a meteor remaining and the last golem is at 3 stacks. And yes it's better to go solotank, especially with the 10% buff it's really easy now.

Good luck !