Reviva is kinda useless there in practice. Fou just dispels it with Sanctuary (this is much worse than what happened in the Isolde fight, since it's pretty much a wasted turn outside of doubles, which aren't -that- common - I suspect non-Quick Draw Blue runs a 4-3 on Fou) and Blue runs out of gas kind of fast in this setup if he's spamming Reviva. Laggy's math feels pretty spot-on there. With 64 JP, Blue is getting like two shots of magical damage before he runs out of useful resources to work with (Bound Shot's odds of ITD are nice, but I've been inclined to respect Fou HP more lately, giving me the gut feeling that he needs three ITD Boundshots minimum to off Fou, and even at maxed Will/Int, the odds on a crit are only 66%. I think mixing with MegaWindBlast, that reduces it to two MWBs and two BSes. Obviously, whenever one doesn't crit, Blue just cries himself to sleep. Too much can go wrong there).
EDIT: Reviva is initiative too! So, replace that with constant 3-2s, but still, Laggy's point is pretty good regardless. Sanctuary shuts down them cheese pretty hard.