I would choose more of a focus. If you want to be aggressive, choose a few creatures, enchantments to support them, and some other ways to apply pressure. If you want to do mana denial control, focus more on stalling tactics and ways to efficiently overcome threats with a heavy dose of mana denial. There are certainly other options including telepit, Gate to Voltari economy, and aggro control, but if you want to focus on an assassination/juggernaut playstyle, then Mana Siphon, Essence Drain, and Mana Leech don't belong in your build. You could use Mordok's Obelisk, Suppression Cloak, and/or Suppression Orb to stall while you setup a big kill play, as seen in the Blasting Banker build, but things that scale help more with that type of thing.
Similarly, don't run 4 Mana Crystals if you want to be aggressive. That's a huge commitment to economy. You might want to run 2, but not 4.
Power Strike may make sense if you plan to use a lot of Blue Gremlins and Moonglow Faeries, but it's a waste to use that on Lord of Fire. Plus Marked for Death is a higher priority for supporting a swarm than Power Strike anyway. Either way, you probably don't need 5 of them. Use Battle Fury as a one shot damage boost or Bear Strength for a more permanent boost.
Consider running Battle Forge. It can save you a bunch of actions, particularly if you plan to be hitting things with your mage's action much of the time.
Consider running more Teleports/Dispels, as those are particularly cheap for the Wizard.
