I Recommend to go with Obelisk Crest, it has a 20secons CD, it gives 8 magical damage per stack, plus 1 permanent AD per stack, and it's UNLIMITED! When you stack it to 20-30 (and it's not hard), you basic attacks go NUKE with the crest!
I should start uploading cause I go super hard with whoever. With Morg particularly its consistent 10+ kills with positive K/D or low deaths. Just tried Greystone went 12-2 first time. Try whoever whatever lane I want. Really dominant.