User blog comment:GreenMoriyama/Niina, the One-Yordle Circus/@comment-7481207-20130816195820

Her main issue is that she has way too much power in each ability (except her W, that one is fine).

Her Q deals pretty AoE dot damage, while also giving very high amounts of resistances and an insane on-hit magic damage. If you're having trouble with numbers, try looking at LoL champions with similar abilities. For example the on-hit magic damage, if you look at Teemo, Kayle, Cho'Gath and Varus for example, you'll notice they have much lower on-hit damage and with few effects besides it, unlike your point blank dot and resistance bonus. Also, if you use it in a team fight, its cooldown will be reduced by far too much, unless each ability only triggers the reduction once.

W as said is fine, but lacks any synergy with her passive since it is a self buff.

Her E yet again has too much power in one ability, AoE taunt, movement speed steroid that lasts very long while being quite high, insanely high CC reduction, and an on-hit stun once per champion that is way too long.

Her ult seems fine, as if it marks the target location like Pantheon's ult then the high damage is no problem. You have forgotten to write how much it slows though.

In general, no single number is way too high (except the on-hit magic damage and the CC reduction), but together with all the other effects you gain from a single ability, they are way over the top. Though this may be due to trying to compensate for only allowing one ability at a time, you are overcompensating in that case. The passive also punishes the player too much. Only one ability at a time while two of them wants to be active for the full duration is troublesome, especially with the low base CC and reduction from the passive.

The stats seem mostly fine, though there is one issue if you want the stats to be like those in LoL: Magic Resist always increases by 1.25 or not at all.

Your champion types are also overdone, each champion is meant to have one primary and one secondary type, and Jungler and Pusher are removed types. I wouldn't really agree for Marksman, as her W alone doesn't really do enough for that. Tank would work, but fighter primary and mage secondary would be what I would classify her as, since she does have high AP scalings on low cooldowns.