This is all I got.
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.
Notes on abilities:
Idk if you can level like this exactly, but point stands: Q then W then E and R whenever you can.
Also max flash Kappa
If you start big frog (gromp), take Q level 1.
If you start rocks (krugs), take W level 1.
If you start something else, take a course in le mental hospital level 1.
Evolve order: Q -> E -> W or R. R for utility, W for offense.
Notes on runes:
Don't need the crit red, I like it for that one random time it does give you the 1% crit and you wreck a fight.
Don't need to have 50/50 on health/armour on the yellow, it's just what I do. Full health or full armour are good.
Can go full scaling magic resist or full magic resist on blues, again your preference. If you mix, do take three magic resist and 6 scaling magic resist though.
Can use any combination of armour penetration and attack damage on quintessences.