Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
I have only just started to play Kayle and so far 100% wins in the 5 games I've had with him with this build. One advantage you have over your enemies is I find not a lot of people know your character or think Kayle is **** when at the start he does a lot of damage.
The items I go with do well with nearly any type of fight but I would advise taking out Nashor's tooth for Maldred's bloodrazor if they have a lot of tanks on there team. Guinsoo's rageblade is a must for Kayle giving her two stats she is good with that get better when your in combat.
Why the skill sequence?
Well the skill sequence is perfect for the way I play Kayle. Most players ignore me not knowing my damage at the start with my first spell. I only lvl my third ability to lvl 1 because it gives me range which is all ya need it for really. By the time you start levelling your heal up you will start to be in team fights which is where you need it most.
Depending on who your up against changes everything. With the average team of 1 tank, a good mid char and 2 dps you should be fine healing your team but prioritise your dps guys instead of you. Stay at the back of the fight doing this using heal as much as you can. It would help having blue buff for this so you don't lose mana. Use your first and third abilities to do damage to there lowest health character picking them off one by one. Use your ulti on any team mate with stack items, buffs or just tanks making your team better after every fight. If you or any team member needs to get out of a fight don't forget you heal also giving you extra movement speed to get the hell out of there.