Res Sickness and Assists (Myst's Question)

[Viola]

When a Prime is experiencing Summoning Sickness, does any Asisst they may have that consists of summoning someone to their aid also suffer from the half stats?

Do you mean Resurrection Sickness?

I'd say that anyone you've already summoned prior to the 'sickness' does not suffer from the half stats (since only your prime died, not the secondary you had already). Does that answer your question? I'm not 100% sure I understood.

I think Myst's question boils down to whether assists/powerups have reduced stats along with your base stats during res sickness (i.e. the things you spend sp on to get stat boosts, or temporary non-fodder allies with stats). 

The physical effects of 'resurrection sickness' make a prime weaker immediately upon resurrecting (half effective stats and SP, 10 points of accumulated damage) and gradually wear off over the course of an OOC week.

Since the rules do say "half effective stats" generally, I'd argue that yes, assists do have reduced stats. Since the stats assists get in fights share your 'prime energy' or whatever (because Omniphysics).
Outside of a fight, it's up to the writer's discretion. (I'd suggest that a summoned golem would probs be weak but your secondary bro would be peachy regardless of when they were summoned)