This is my first attempt of building a guide here and I just wanted to share my build that I really enjoy using for Kayle. Now first, my build will not offer the best there is in survivability, but the runes along with Kayle's intervention should be enough most of the time.

I take Surge and Exhaust as my SSpells. Surge gives great atkspd bonus while also giving you a little more damage on your E and Q. I mainly use exhaust to stop fleeing enemies or reduce damage from big damage dealers like Yi, Tryndamere, Akali, Etc. Try to use exhaust after your invincibility has ended.

I take Armor penetration marks, armor per level seals, magic resist per level glyphs, and armor penetration quints, this set up sort of compensates for the lack of survivability items and should allow you to take a small beating.

This build optimizes attack damage, but Frozen Mallet is a good alternative if you feel you need the health, banshee's veil is also another good alternative, but if the enemy team has a lot of poking abilities to pop your shield easily i suggest you go with QuickSilver Sash. If you're gonna replace an item i suggest you replace Youmouus Ghostblade. Maw of Malmortius is great item if your facing a lot of AP casters.