I think it is too early to tell. But if Menendian's Oath deck is any indication of what is coming, maybe sticking with REB is the way, but with Ichorid surely going to see a rise in popularity BEB is a good way to buy some time by smoking off Flame-kin, if FoW dread return doesn't work. Maybe a mix of them and then SB accordingly. Considering if you have landed a painter naming red, BEB owns and there is enough blue spells around that REB isn't dead.
BEBing Flame Kin Zealot does little. All other Bridge tokens will still have haste and be 3/3.