Feat for Haste might be a better idea. Shuri already has a direct damage spell, and Feat has so many uses that it's like learning a ton of spells at once. Other than that I say...

Poison for Biohazard (it's like an upgrade).
Heal for Defender (another upgrade, heals 10HP like Heal and gives us more HP capacity).
Fysics Phailure for Disbalance (FP is too random anyway).

I like Quantum Squaredance and Custard's Last Stand, but Fooruman's spells are already so vital. Custard's Last Stand for Ramming Speed could be a good trade-off, I guess. What do you guys think?