So I'm currently playing as a vampiric dunmer assassing who also uses spells to get the job done, but I can't think of any good spells for an assassin because I like having that sneak multiplier. Any ideas for good spells for an assassin?

The drain health 100 points and soul trap x1 sec on touch fits the vampire assassin build.

Command creature / humanoid is a very good spell that plays with the whole mind control thing.

Summon spells are handy for the assassin build to help sidetrack the enemy.