General support stuff :D
Oh hi hey hello... I'm a new support main ,eager to learn some new tactics from some experienced support mains ,if you could help me , yeah, that would be awesome , thanks :D So ive got some questions and if someone who knows theese stuff ,could lend me a helping hand i would be EXTREMELY GRATEFUL ... first : ive seen sometimes besides the usual staring support item people start wirh 3 normal pots or a refillable.. whats the reasoning behind it? second: i saw various runes , example : ive seen alistar played with unsealed spellbook and also aftershock but also with the shield thingy can you explain when to pick wich one? third : speaking of unsealed spellbook... i swa people picking cleanse for ornn , rakan, taric, alistar and many more... why? also what if the enemy has a zed so i need exhaust but i saw people pick cleanse still why why why? fourth : support can be categorized into 3 groups... healers, tanks , ap bullies... when to pick wich, what are the counters and so on and so on... thats all, sry for my english i mainly learn german , thanks for helping <3
start for high poke or lanes where you want to fight early, and it is best for tanks 
is a greedy start that AP supports can use to get their items faster, or safe lanes (like Lulu support) can use.
-engages so they can win lane.
is a dumb choice. You CAN use it for 'baiting' in lane, but that's all, really. 
cancels a lot of 
and is the best choice. 
. 
is for defensive lanes, or against champions like Zed who want to kill your adc.
etc.