User blog comment:JmLyan/Zenbakia, the Number Master/@comment-3476718-20130621180359/@comment-1330314-20130621194152

The problem with an ultimate like this is that it still makes for a fairly easy kill. If people build pure AP on your champion (as they should), then they could easily OHK champions at half health or even more. If you want to have an ultimate that secures you a kill, you need to make it very challenging to use, perhaps by requiring some kind of preparation or by making it difficult to use to its full potential.

Your passive is interesting, but wildly situational. This'd only really benefit competitive players, who'd try to calculate precisely how much damage they need to land, but otherwise it'd provide little use even in combat, especially when smart-casting or quick-casting abilities.

Zenbakia's Q has a really cool mechanic. You said below that Numerology stacks have no cap, which may not be a good idea. Other abilities, like 's ult, that have a stacking damage component have a cap, even when that cap is nearly impossible to reach.

As Myydrion said, his W is too powerful. The base damage is fine, but you're adding in both high AD and AP scalings, which would destroy hybrid champs. The enemy AP damage scaling is also just shy of that on 's ultimate (70% to his 80%), so in a little over 10 seconds (assuming you build no CDR) you could deal around as much damage.

Plus/Minus as a mechanic is really good. However, you may want to reduce the amount of healing it grants. The base damage and AP scaling on Minus is also a little too high, as it's higher than the true damage component on 's Q, which is arguably far harder to land correctly. Also, why true damage? It doesn't synergize with Zenbakia's passive at all. You're better off leaving it at magic damage.

The ultimate you gave him above is not a good design idea at all, since you're sentencing an enemy champion to death with no real possibility of counterplay. It's also completely useless in fights, and doesn't contribute to the team in any way.

Overall, you've good a lot of good ideas for your champion, but you need to balance them a bit more carefully. You've got really awesome mechanics on Zenbakia's Q and E, but bits of his kit are a little awkward at the moment.