[{quoted}](name=Vlad Maine ,realm=NA,application-id=3ErqAdtq,discussion-id=PVJBXgEW,comment-id=00010000,timestamp=2017-02-19T05:27:32.733+0000)
the problem I've been having is that while I can almost always, in nearly all games, hold the tower.... I can't do anything with him if my team (and especially if my frontline) is really behind.
Generally I can win the lane and in the mid game I shove and then roam bot for kills. My tower is almost always the last to fall of all the three towers.
However, late game I find that he's very squishy and that no matter how ahead I got from before, its too tricky to play around their fed front line if my team fed.
Whereas if I'm Annie I can Flash Combo the backline (the stun means they can't retaliate) and reliably still contribute... or if I'm Vladimir I can pretty much ignore the front line and run at their backline because of the sustain, tankiness and AOE nature of the damage...
With Viktor its harder. If I Flash at their backline, land part of my Q and they Flash back... all of a sudden I'm seriously screwed because their team will just collapse on me and kill.
This is kinda why you should be running ghost instead of flash, as it offers both offensive and defensive options with a way lower cooldown (ghost in and proc thundies, or ghost away from enemies who try to dive you).
Comparing annie/vlad to viktor is also something you shouldn't be doing, as both do different things. The former are meant to "dive" enemies and probably die in the process. Vik is a lot like cait/ezreal, in that you're supposed to "kite" enemies and get them to focus you instead of your spells, so that they'll do things like stay in your w and let it "center" them or stand in your e and get hit twice by it. If you can kite them and not let them ambush you, then it doesn't really matter how far behind/ahead they are as they'll still die anyways.
Lategame, your goal always should be to not so much aim straight for the backline but do as much damage as possible to who is in front of you. If that's a frontline, then the damage they take will hardly be insignificant (unless it's something stupid like a maokai with 300MR and his ulti popped) and might force them to b. If they have zero frontline (which happens in about 70% of my viktor games), then popping them shouldn't be difficult unless they have tons of mobility (rylai's helping for that q-slow) or went full mr with hexdrinker/eon/qss/ga.