dps if spots are available please.
edit: actually strike that. Was just informed we’re watching House of the Dragon since we’re off work tomorrow. Good luck!
I have the achievement but may be able to help. At the Pub power plant med center, have the Imps go right when inside the fenced area and summon from there. The inside area where they won't aggro the guards is tight, but it's an easier run from the respawn point. The Imp respawn at the dam is very close too--I didn't even bother mounting up. When I did the achievement, we had about 10 on each side and it took about 30 minutes (which included forming time). Good luck!