Alright this is my first build so go easy on me :D
Key to this build is you HAVE TO lane with a ranged partner and preferably one with some sort of stun/slow/Silence because you will not do alot of damage early game and you're rather squishy.
You can try to lane with a melee char but if you get 2 ranged against you in a lane it will be very hard to keep get close enough.
You also might want to kill some neutral mobs along the way to get some extra cash because you will need it with this rather expensive build (Golem buff does wonders)
I pick Ignite for obvious reasons, the extra burst (You can pick what ever you want).
Clarity is a MUST, you will run oom very very fast and you will need it to keep going(as said above, Golem buff should help alot)
As mentioned above this build is rather expensive so you will have to be very patient and don't expect to pwn early/mid game although you don't have to play that defensive just be careful.
In my opinion this item vuild works great with Kayle' ''new'' passive but it's still variable, there are other items that might suit you better.
So pls rate the build and leave some comments on how this build could be improved and I will even try it out myself and edit the build if it works better.