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.
This is a build I wanted to create for a friend, Mercmagee, who's new to LOL and has not found a hero suited for his style yet. This build will allow you to aid your team while being in the fight at the same time if you prefer to do so.
Mastery Tree: The masteries are ganna be on the defensive side since you're new plus Kayle can take a hit anyways. We're also ganna grab from Utility for quick respawns and exp. Mana and HP regen is never bad either.
Runes: Im not ganna make a runes page bc I don't main Kayle and I don't know great runes for her. If your looking for a good runes page I'm sure you'd be in a more professional guide. This is a beginners guide so I wouldn't expect you to have a lot of runes anyway so it's fine if you have none (personally I saved up until lvl20+ for tier 3).
Summoner Spells: Since your new to Kayle lets go support, Heal and Clarity are great SS for the team during a battle.
CORE: Berserker Grieves (BG), Nashor's Tooth, Rod of Ages (RoA), Sheen, Guinsoo's Rageblade (GR), Hextech Gunblade (HB).
I start with Doran's Ring ring for the +HP, MP regen and AP. All of these are good for Kayle at the start of a battle plus Kayle is a bit mana dependent early on. Gr ab a HP POT[ while your at it and head out. My first boots are BG for the attack speed u will need later on. If you too mana dependent still you can work on the regen aspect of Nashor's 1st. After boots you should finish your Nashor's the AS and cool down reduction and regen is great. After Nashor's get Rod I really would like to bang Sheen out first because its WAY cheaper but the longer you have Rod the more its passive kicks in. Next get Guinsoo's for more AP, AD, and AS. Now your Kayle is looking pretty good. After that get Aegis of Legion now if you were carrying the team you wouldn't have to buy but this is your first time Kayle and you want to support the team with these auras and Aegis is a good item. Remember no matter what your score is, if you're doing your job you helped you're team win just as much as the carry did. We NEED them HEALS/AURAS! Lastly to be most effective in the fight grab Hextech Gunblade and your damage and AP output should be complete.
Guardian Angel- If you find yourself being focus or your team needs an initiator.
Last Whisper- grab this for a tankish team.
Abyssal Scepter- grab this for auras if you have a lot of nukers on your team it will lower all enemies magic resist.
Majai's Soulstealer- Grab this if you are doing a good job surviving (since you're support) and could use an AP boost.
Infinity Edge- If you're doing your thang on the frontline and need a damage boost than IE is the weapon for you it gives out bonus critical damage along with the 20% crit that comes with it.
You're core items will not fill your item slots so if your playing a game for the long run switch to any of these optional items best suited for your situation and finish the enemy off.
I hope my guide helps my friend along with any new players to LOL between level 1-15 or so and are looking for a good starter hero in the 450 IP range.