Minimum
This is the minimum I would get before switching to this build. You need the right setup and there is about a 20% chance to fail before the build gets going. Using this setup I would average about 2500 kills in normal mode. The Bubble cooldown shot perk is required to use bubble at all. We do very little merging with this build and getting as many upgrades to the bubble cooldown will help consistency. The light buff range makes this much easier to setup and I could not get the build working without it. Chain Predation helps to scale the build without lots of buffs to predator damage. The Chaos Dice ATK SPD perks are key to getting the predators attack speed low enough to get to maxed.