Yes, that would be fine re SuperPump250 - it doesn't need to to be dosed at the same time as the H.E.A.T. Stack, though.
The H.E.A.T. Stack intra-workout or the SuperPump250? You're better off using the H.E.A.T. Stack 1 cap first thing, 1 cap ~8 hours post-Dose 1, and 1 cap pre-bed; and the SuperPump250 ~60 min pre-training.