TOP LANE
(1) Gangplank:
Pros: Good laning phase, super strong mid/late game with barrels and the insane damage output, wave clear also, incredible zone control, very good ultimate, secondary carry late game, ult is one of the best in the game
Cons: Squishy since he has to build FULL AD, relies heavily on barrels doing it's job
(2) Irelia:
Pros: Incredible snowball potential, huge power spike with Trinity Force, 2 second stun, tanky (passive, R+W).
Cons: Damage falls off a bit later, like not as insane as her mid game power spike.
(3) Fiora:
Pros: Very mobile with Q, great laning phase, incredible snowball potential, hard to trade with W, hard to gank, has W to outplay people
Cons: Kinda hard to get all 4 vitals off with ultimate.
(4) Riven:
Pros: Snowbally, a lot of mobility, good sustained damage & burst and also should be higher if your a riven main
Cons: Useless when behind
(5) Garen:
Pros: A lot of base damage, great mid/late game, compared to old garen basically got buffed, can do a lot of damage with just a black cleaver.
Cons: Laning phase is meh, kitable,
AD CARRY / MARKSMEN
(1) Mordekaiser (yeah not really a adc/marksmen but you know what I mean)
Pros: Dragon pet, Q nuke bomb, W is broken with a melee support, incredible snowball potential as you can't kill him if he's fed and dragon just gives so much objective control and can 2v3 the enemy bot lane + jungler, levels faster
Cons:: No ADC, mediocre with a ranged support, doesn't abuse his W passive if he's being zoned and can't CS.
(2) Kalista
Pros: Great at kiting tanks, awesome mid game power spike, strong laning phase.
Cons:: Falls off late game SUPER HARD now
(3) Vayne:
Pros: Great dueling, Tank killer, great late game
Cons: Weak laning phase, everyone plays her like... even non ADC mains
(4) Sivir:
Pros: Ultimate utility is GREAT, very high kiting, pushes waves easily, spell shield is OP as a defensive tool especially late game with 10 second CD.
Cons: 500 range! A lot of small nerfs in the recent patches with her ultimate
(5) Tristana:
Pros: Tower destroyer, great with resets and cleaning up, late game monster, great self peel, big range on her escape.
Cons: No base damage, relies on going even or getting ahead
JUNGLERS
(1) Skarner:
Pros: E has too much base damage, incredible CC, a lot of damage output, INCREDIBLE map control with spires, snowballs hard, R drags people back farther, no need for mana items, just plain OP
Cons: EDIT: HE JUST GOT A HOTFIX IM NOT SURE WHERE HE STANDS RIGHT NOW SO I ADDED A #6 FOR THE TIME BEING, though hotfix not on NA yet
(2) Elise:
Pros: Back to Season 3 Elise, except even stronger. Magic Penetration build is OP on her especially with spiderlings doing magic damage, can max W 2nd with the E early game buff. Early game high pressure Jungler. Becomes OP cocoon bot late game
Cons: Hard to play.
(3) Rek'sai:
Pros: Ult is great for farming, flanking unsuspecting enemies, great basic damage, awesome peel with W and stops gap closers if played right, TUNNELS FOR MOBILITY = FASTER CLEARS, map control, tanky with passive, good ganks.
Cons: Only 1 CC, not a lot of utility when behind (but it's hard to get behind when you have fast clears)
(4) Evelynn:
Pros: Wards useless (unless deep wards), very good early game pressure, mixed damage, good initiation
Cons: Falls off late game
(5) Nidalee:
Pros: Very strong jungler early game, good mid game, fast clears. Runeglaive gives her ganks more consistency since she has to just auto, stronger mid/late game cause free lich bane.
Cons: Snowball reliant, Q skillshot reliant, no utility except heal. Weaker poke mid/late (cause 40 less ap not from magus but NOT BIG DEAL)
EDIT: Skarner Hotfixed, not sure where he stands so added a #6
(6) Nunu:
Pros: Cinderhulk + Q = easy clears, make ADC = SSJADC which makes him great late game, very strong peel with E and R.
Cons: Not a lot of damage
MID LANERS
(1) Twisted Fate:
Pros: Decent poke, semi-global ultimate, Wave clear, Luden's echo user, 2 second stun every 6 seconds
Cons: Easy kills in mid, no escapes (except ult but...)
(2) Ahri:
Pros: MS buff made her very hard to kill and also mobility is given, still has damage to kill people with full combo. Kit is forgiving
Cons: Damage isn't as big as some other champs
(3) Fizz:
Pros: Super good all-ins, high assassination potential, invulnerability with troll pole, hard to kill
Cons: Has to be aggressive in lane.
(4) Diana:
Pros: High assassination potential, high AP ratios, tanky with W and resists, a lot of burst damage.
Cons: No kill pressure pre-6, relies on Q hitting
(5) Viktor:
Pros: STRONG base damage (scales really good with levels hexcore & Q), good when behind, great burst damage, wave clear with E. LATE GAME STRONG
Cons: Short ranged, his only form of CC is short ranged also (more of counter initiation then initiation)
SUPPORTS
(1) Janna:
Pros: Ultimate heal + CC, godlike mobility with W Mobility Boots & Passive.
Cons: Squishy, reliant on using skills efficiently
(2) Soraka:
Pros: Heals, oh and a silence that's good for chaining CC
Cons: Short range, roaming sucks
(3) Thresh:
Pros: Good thresh players will carry, a lot of utility, basically does everything a support can do.
Cons: Hard to master
(4) Nautilus:
Pros: High CC, a lot of damage with E and a lot of utility, ult to lock-down enemies, scales great as he gets levels, TANKY.
Cons: Can be poked down in laning phase. E dmg nerf but w.e
(5) Alistar:
Pros: Good mid game / late game, extremely good roamer.
Cons: Not a lot of damage, 0 threat after Q + W is down
I hope it help you