GA SBP would slaughter Grail and Alan Scot with Starheart.
Grail's best feats are found in DS Wars. Besides that, she's been placed mostly on WW's level. Alan with SH is strong but nowhere close to GA SBP.
Besides Alan with the green, Prime will likely one shot everyone. As for Alan, what did he do that make him a threat? One shot DS?
SMP GA still beats them all