So I recently took up Kassadin and Kayle in 3s. After feeling pretty indifferent about Kayle having both great games and terrible ones I decided to check the next archetype off of my to get list for any sort of future of having a viable roster readily available to fit any mold.
Anyhow to skip back to my point, it appears Kassadin has been nerfed recently and I personally feel as though his 3's build regaurdless wouldn't reflect his 5s build. Why? I think that in 3s you need to be somewhat tanky meaning you cannot go full AP and expect to do well in twisted treeline (to my experience) and also the games are generally much shorter making expensive core builds and RoA less viable (again based on my personal experience and opinion.)
So then what i'm currently experimenting with is a 9/21 build. We all know Kass is a snowball champion because he has a weak early game and needs expensive items therefor he must get kills or out wit his opponents early on.
I'm not sure whether or not I should get flat AP runes to benefit his early game mostly in harassment and if i'm lucky kills. Or should I take gold per 10 seconds runes and take catalyst trying to prolong the laning phase?
(For anyone wondering why I would take 9/21: my justification is early HP, reduced disables, CDR per level, +gold per kill / assist, with very low loss of dmg early game which is where Kass struggles the most) Not to mention hp/5 for laning phase which admittedly is the least useful of the above.
If anyone is willing to theory craft a 3s core build for Kass I would be thankful. I don't agree with a majority of the guides out there but that is mostly due to the fact that i'm the odd ball that only plays 3s in a community that lives for 5s.