Kayle provides excellent team fight and laning qualities because of her heal and slow. In most Kayle guides everyone says max E first well not in this one. Your E doesn't benefit you in bot lane as much as your Q, W, and R do. Basically when you play kayle support you don't want to spam your heal or slow; you can use your slow to harass and you can use your heal to help your adc escape from large damage outputs. In team fights you basically just do what every Kayle does press E and afk... jk jk this is support kayle you do still use your E but you have to pay attention to your allies you need to know when to ult, who to heal, who to peel for, etc. My recommendations for an ADC as kayle.. honestly anyone one would work however you will see the best results with a kalista(slow enemy more rend stacks, speed for more evasion and stacks), a graves(slow allows graves to catch up w/o using dash), and finally an ashe oh yeah you heard me an ashe just think about it a slow for crits and then a fast ashe who doesn't die and you can't outrun. Personally though Kayle can work with any team comp beautifully.