Typically I play just about every champion depending on what I think is best for the game / team comp - or I just play whatever I feel like playing stylistically (ex. today is a Nidalee day, because Meow). I would like to standardize my champion pool though so I can focus more on having real mastery over a select few (my quest for Diamond). This is what I'm thinking so far:
Elise - one of my long-time favourites, very flexible
Evelynn - my personal strongest jungler, she just clicks with me, but has a lot of hard counters and comps
Rek'Sai - this should be my AD jungler? I admit I don't play her as much as I should
Nidalee - I'm good with skill shots, I love her mobility and heal support flexibility
Warwick - tanky enough for not getting counter-jungled, strong ganks, good counter-tank (BotRK)
*Malzahar - strong wave clear, high CC for dueling and teamfights (this should be your mid main for ranked), can probably take Flash+Teleport
Diana - strong Assassin, strong anti-melee
Viktor - strong / team-fight / late game
Twisted Fate - safe / strong ult / stun / wave clear, can take Flash+Teleport for tons of map presence
Varus - strong AD poke / harass
Janna - strong / safe pick for me (like my Sivir), but really relies on the ADC 'getting it'
Annie - Orbital Bombearedment is OP in solo Q, plus if your ADC sucks you just become a mage
Blitzcrank - I'm good with skill-shots and nothing breaks a bot lane stalemate like a Blitz grab, or initiates a 5v5, does well with Zeke's, doesn't feel tanky though
Thresh - I keep telling myself to get good with him but never do
Sona - seems to compensate really well for lack of communication in solo Q, heals are great, fantastic ult, etc
*Lux - similar to Sona / Annie
Morgana - similar to Annie / Lux
*Sivir - strong safe pick, especially versus Blitz/Thresh/Naut/Leona
Jinx - no escape, do not pick into Blitz/Thresh/Naut
Tristana - weak early game, do not pick into early poke/dive champs
Darius - OP
Black Cleaver + Mercurial Scepter?
Irelia - safe pick all around
Trinity Force + Spirit Visage?
Fiora - great duelist
Black Cleaver + Ravenous Hydra
*Vlad - safe/strong pick for me top (naturally good with him)
Will of the Ancients + Spirit Visage / Rylais / Abyssal / Void Staff
Shen - strong teamfight pick, terrible lane phase though (strong vs weak tops)
BotRK + Spirit Visage?
This made me realize that for someone who mains jungle, I don't really know what my go-to Jungler is anymore. I'm strongest on Evelynn and Nidalee, and then Elise and Sejuani - but they are all AP for me: I don't have real mastery over any AD jungler: I'm debating Warwick or Reksai, both have good hard CC for Solo Q picks. I used to be pretty good with Olaf top, maybe he becomes my AD jungler?
Let me know which I should de-emphasize, and which I should focus more effort on.