User blog comment:Johannah14/Maxing some Abilities/@comment-6334772-20130529015128

Yes, Tumble should be maxed on Vayne first. Riven though, Broken Wings is really what you need to max first, unless you're against a champion with powerful poke, in which case you would max E. W's stun duration doesn't go up as you level it so there's no point in maxing it before any of the others. You get a whole lot of trading power from Q, sometimes enough to kill them before level 6. Your skill order for Kat is fine. Lulu, I think, can max anything depending on her opponents. If you need to poke through minions and slow, go for Q. If you need to stop someone with a hard engage, max W. If you want more poke and to defend your adc better, go for E. Lulu, like most supports, has to adapt to her situation and opponents for determining the order of her skills.