As to epi, I wouldn't. It's one extra damage, for 1 extra quanta (against frogs, not sure about warden). Becuase it's running off pends, that means you need 1 extra super nova. If your one nova short, it would take an additional 5 turns (game is probably almost over) for it to do damage again. Also P. recluses have absolutely no hp, so 1 creature with 2 hp is a whole lot weaker than 2, with 3 and 2.
As to the current deck. Why not an unupped rage pot? Usable on crawlers and wardens, or any of the cards (except phase recluse) with a single blessing. Also, CP's are VERY fickle, and theres no guarantee of getting the extra point for an upped potion.