User blog comment:Hamengeri/New item and slight change to Twisted Fate (Cstom stuff)/@comment-3974211-20140101234714/@comment-10256611-20140102090341

While this is what I feared, lack of sustain in fights is IMO one of main reasons we don't see AP Marksmen. To make and  (though I'm not sure how her innate works, gotta check) less broken, first passive can be tuned down to aplly only a portion of spell vamp if on hit effect is not a single target single instance damage (just like normal spell vamp is reduced).