Archmage's Arcane Reach & Arcane Trickster's Sneak Attack

--------- Vampiric Touch ------->
And if the sneak attack damage was of the same kind as the original spell, would it add to the spell's effect in dealing damage and gaining temporary HP in this case?
Perhaps you could combine this with a Lesser Maximize Spell Rod..... mmm, I can taste the EVIL.
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MY PERSONAL FAVORITE!!!
Archmage's Arcane Fire & Arcane Trickster's Sneak Attack

ARCANE FIRE SNEAK ATTACK!!!!
Drop a cantrip to perform a ranged touch attack that deals 5d6 points of pure magic damage, if one has five levels of Archmage... and use it to make your sneak attack. Ray of Frost? Say What?
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I never really liked the idea of allowing one to make a sneak attack using a magical effect. It sounds like an epic feat to me.