But I kind of don't because I feel as if my champion pool is quite large already with 29 champions. Then again, my friends say it's rather small for how long I've been playing (since late 2013, though I really don't play that often). Here's what I've got:
I don't play really at all unless I'm really bored of my other ones because I generally find these champions boring.
My top ten favorites are: > > = = = = > > > .
From what you said you favor, you mostly seem to like burst mages and assassins more than most other champions, so above are a couple burst mages, followed by 4 assassins. Also you already have him, but try Cho'gath and build him full AP for mid lane. It's pretty disgusting, his full combo will 1 shot anyone who isn't a tank, and if the tank didn't build much MR yet, it'll 1 shot them too.
I'd suggest building as follows 
Last item is your choice, but I suggest a defensive item, the AP you've already build is enough to blow up just about anyone. Depending on team composition of the enemy team 
. I prefer grabbing anything with CDR on it. CDR on Cho is pretty nice. You might also need more magic penetration, so never forget about 
Ok, I'm updating this. After looking around at some champs, I've narrowed it down to 
. Any suggestions?
