2v1 mentality

[Ashe]

One thing you have to keep in mind is what the enemy's team comp is up there. If they are running something like Kayle + Tryndamere, then what's going to happen is they are going to use Kayle's Righteous Fury to just push the shit out of the lane while Trynd takes the last hits, then Trynd will tower dive you regardless of who you are or what your health is and do as much damage as he can with his Ult + Kayle's Ult to let him just get back out. After you pop all cds to survive, some of which are likely to be triple their ult cds, they'll just keep farming till their ults are back and suicide you again, every time. What happens is that if you stay, they kill you. If you leave, they kill your tower. Half the time, if you stay, no matter how careful you try to be, they kill you AND the tower, simply because you can't do a damn thing about it.

In those situations, (and similar, extremely bursty teams like Poppy + Zilean) you pretty much have no choice but to ask your jungler to lane with you. Hopefully you can avoid it, but it DOES happen where there's just jack shit you'll be able to do about it.