User blog comment:Ricoindigo/WORK IN PROGRESS : Mage update patch for Season 6/@comment-24420226-20160128194548

Side-stepping the viability of putting an AP ratio on Vel's passive, giving it the option to ramp  up on successive detonations up to 10 times seems irrelevant. He can get at most 3 detonations within a single spell rotation, at which point if his target isn't dead (unlikely with the ridiculous amount of damage coming out of that true damage + ult), he now has to rely largely on interlacing autos between the cooldown on his Q (Void Rift simply has too long of a recharge time). Which again, is somewhat moot since he can melt all but the most tanky of champions with even half a rotation. It's a mechanic that Vel'koz doesn't seem able to utilize properly.