Overflow Challenge

Description
This is an infinitely repeatable 6-hour challenge that you generally should not be doing unless you are done most of your other challenges. Your goal is to get the highest score possible based on killing v4s, building black holes, building (a few) BHU, having a high pet multiplier, keeping universes in reserve, and training might and spacedim.

Unlock Condition
Defeat PEV4.

Reward
Challenge Points: 1 Statistics Multi: 1,000,000

Reward is sqrt(score) "Overflow Points", which can be spent on various permanent upgrades.

Recommended Stats
Requires defeating PEV4, so needs at least 10M clones and strong pets. All stats are helpful for score (CS, BS, CC) and finishing all other challenges except UAC will make progress easier.

Strategy
The square root in the scoring means that to get twice the overflow points in a run you need to have 4 times the score. For that reason it is more efficient to do shorter runs (6h/12h) than longer ones (24h+). All sources of points also either get more expensive as you get more (BH, BHU, Might, SpaceDim, UBV4) or have a parameter in the scoring that makes them worth fewer points as they scale up (Universes, Pet Multi).

You should be saving most of your universes rather than using them to build upgrades.

Scoring
Your total points gained are the square root of:
 * (Universes held) ^ 0.6 / 2
 * Black holes * 10
 * BHU * 10
 * Total mights trained /5
 * Total spacedim trained /3
 * Total RTI temp levels /3
 * Total pet multi ^ 0.38 /3
 * 100 * (V4 kills) * (V4 kills + 1)
 * If you have completed >20 UCCs, multiply this number by the UCC bonus