League of Legends XXV: Who is your Summoner, and what does he do?

[Kairaven]

<---he

yes, I mean mages, in particular I mean Malph and Xerath, and yes, i know it's burst enemies down to kill, I can do that. I am asking more about that "if" enemies survive, is there any means to chase aside from flashing in. fact is both malph and xerath move slower than molasses.

I suppose I am just going to have to build Rylai's much earlier then. still, rushing RoA and Hat then rylais feels a bit cumbersome.
(edit: I mean usually I like to build armor or mg res at this point so I don't feel squishy)

double edit: this is almost always 1v1, during team fights I am fine.(unless team crumbles) just would like to get that kill for the farm.