I love playing Master Yi for ABAMs and if the opposing team lacks channel disrupting CC than he is unstoppable unless ignited. Channel disrupting CC is normally knock backs, stuns, and fears/charm/taunts.

Snares and locks dont stop Yi from healing, and a good Yi will use his heal if they have no distruption as a TAUNT mechanic such as teemos global taunt. It is so funny watching a whole team and tower focus Yi while meditating over 3k health back and with over 350 MR and ARM, while the rest of my team takes down everyone focusing me while Im practically un-killable.

The main counters though to AP Yi are champs with more than 1 or 2 disrupts as normal spells. Ex: Blitz, Fiddle, Naut, Ali, and any other pure CC machine.

But thats just my 2 cents on why AP Yi should be in a higher tier placement.

I agree that AP Sion is trash tier.

But AD Sion is one of the most OP ****ing things in ARAM. He won't be off the bat, but with just a few mild attack speed and crit items behind him, he AoE heals his team better than any support ever could, tanks for his team, and brings a stun and damage-soak shield to boot.

I honestly feel Soraka should be Tier 2, if not Tier 1. Insane sustain against pokes, great passive for the entire team, clutch saves with heals and silence, and once she builds tanky enough she shreds entire team with starcall spam during teamfights. Against AD, I'd build Frozen Heart, and others I build Rylai and/or Abyssal, and they simply can't touch me and/others when I'm just healing them with my ult and Astral Blessing.

You rate tanks far too low.

nice work, but i played this map since release on pbe almost everyday, with good and bad payers. probably more than 1k games in it. i disagree with most of it BUT the thing is, i beleive there is a tier list for every level of play. we cannot make a good one til they make a queue for it. i seen nidalee failing really hard when the level of play was low. trundle is actually incredibly stong sustain/debuffs and bush control i would place him in tier 2, but again no one really plays him and people dodge when they get him.
imo lux and maokay are the god tiwer champs in this map when the elvel of play is high, i ban both in adam matches when i play with proving grounds veterans. it is simply impossible to push vs a lux when her ulti cd is lower than minion wave respawn you need to handicap your team by bying **** load of armor if you are a tank to give the opporunity for your team to fight under enemy towers. since most comps are 3-4 ap. that armor isnt that useful overall. ap mao is god tier because he is so easy to build without waisting stats and his kit is just perfect, **** load of burst, cc and aoe ult with damage reduction. mao is simply a swiss knife. he only lacks dps because you wont build ad on him obviously. and yes you are right about jayce being a more powerful pick since he can carry, but nidalee can win games with her supportish gameplay style. 2 spears and the next fight will feature 2 low hp enemies. and she can still be useful with heals, 60% as buff on your adc, mr and armor debuffs, and insane cleanup with cougar form. you cant really compare both, they are way too different, most people dont compare nid with jayce, they compare nid q with jayce q.
also imo caitlyn is the best adc since she provides bush control for early domination, her ult is better in this map than in sr since epople cannot recall and damage is permanemet unless they use summoners or have sustain. she is so hard to kill and provides utility.
also you should add super godlike tier wherre there will be only 1 champ. black terror talon (pre bc nerf lol) only countered by getting 2 warmogs. rip true damage talon

also cant wait for the proving ground queue XD i hope champ select wont be random or people wil jsut buy the most op 16 champs and queue there gg 100% chance tog et op champ good luck wining if you have 100 champs unlocked. arma queue would be possible only if they make it like this:
-required 50 unlocked champions
-in some special menu, you need to select the 50 champions that you will queue with. so 2% chance of getting each one of them. it will be then fair

ato come back in the main subject. i play you classified tier 4 trundle in draft when enemy have only 1 tank. proceed to ult tank, q the ad then type in chat: where is your tank nao mouahahahhahahahha. then proceed to dunk. dont forget to troll pillar an ulting enemy kat.

Nasus should probably be in the "nope" tier. He's just too farm reliant.