I can defintely get behind these spells, but ones I would also suggest...
Glacier Splitter from Aerns
would be like sub zero smash, but be a stronger version of paralyze then Sub Zero Smash.
And my final suggestion is a spell I've had an affinity for but have no idea how to apply it now that Everyone's Rancore came out. Originally I had hoped the spell would work based off of the BLU's hate from the mob within the party, based on what % of hate you had (guaged by the SCH or if the mob is attacking you) would be the multiplier for the damage you give to the mob. When you do the spell, it would reduce your hate to 0%. I mean this could also have like a 2-3 minute recast I wouldn't care, a spell like that would be a very heavy asset, which is why I was so dissapointed to see that Everyone's Rancore came out to be something it totally isn't for mobs.
Vitriolic Barrage
YES F*CKIN PLEASE! Thats Disseverment +1.
My last idea would have to be moves from the chariots
Inertia Stream? Pretty awesome
Discharge? Could be as I addressed earlier, a stronger paralyze
Discoid? New 1000 needles and maybe better accuracy?
Homing Missle? Could be used when a mob starts attacking a mage that has pulled too much hate for the tank/DD to pull off hate better
Mortal Revolution? Who wouldn't love AoE physical damage + Knockback + Stun, thats just win!