Burn priority 1 this early?

I snagged armstead in free agency but I just saw someone drop Tevin Coleman do I drop armstead to pick up Coleman??

Standard league

I should note I don’t have mostert, otherwise I think I would 100% do it to keep that backfield locked up

*Edit: was responding to another post when i realized i got Coleman and Breida mixed up. I still think Armstead due to him being given the lead role at least for now, where Coleman is part of a 3 headed beast with Mckinnon and Mostert