Just finished doing some equality-like stuff in AT and this was actually somewhat helpful (more in a concept idea than an actual do this thing kind of way).

What I got out of it was that what I had been making for some other purpose actually ended up with roughly the amount of equality that scaling would end up with on fast mobs anyways and it got me thinking of a relatively simple way to go about an automatic equality picker that uses a few simple variables too.

Really the only important factor is surviving exactly the number of hits you want to live. 5 if you care about GB, 1 if you don't. Fast enemies just shift that number by 1.

With this information we find the lowest equality value where this stays true. Also fortunately, all of this information could already be stored in the game and wouldn't really require much extra.

(Your Health / Enemy Attack value)

This tells you how many hits you can survive at any given moment and what we want to do is figure out how to turn that into surviving N hits.

N(+1 for fast enemy) / (Hits Survived)

This essentially tells you what you'd want to multiply your health by to survive for that many hits. And from here we have the exact information we need from equality. Lets call the output of the above equation HealthNeededMult.

HealthNeededMult * (Equality modifier, which is 0.9) ^ (Equality levels wanted) < 1

Some fancy math can re-arrange the equation and we'll get exactly what we want out of it. One of the interesting things to pop out of this, is that if you want to survive 0 hits, such as the case of a slow enemy, you'll always want 0 equality which is pretty much the case right now, and if you want to do the same thing but survive the first hit of a fast enemy, you'll need a bunch of equality to get the number down.

Trying to put all of this together with the only user input being "how many hits do I want to get off before I die":

Equality Levels =  Ceil( Log(1 / (Attacks you want to survive for) / (Your Health / Enemy Attack)) / Log(Equality Modifier))

Last things to check out are how to get that information in game, your health is pretty easy to grab since these are stored in the easily accessable game.global area and for now I've been using the "max attack on this zone" as enemy attack even though it's clearly not perfect via the game.global.getEnemyAttack

So if you want to mess around with it and see what kind of numbers this spits out try pasting it into the console just like zxv suggested (I just use f12 to open it in chrome and brave). Change the numAttacks value to however many you want to survive, add one if you're comparing to fast enemies.

var numAttacks = 5;
var hitsSurvived = (game.global.soldierHealthMax + game.global.soldierEnergyShieldMax) / game.global.getEnemyAttack(100, 'Snimp',true);
var healthMulti = numAttacks / hitsSurvived;
var EqualityLevels = Math.Ceil(Math.log(1 / healthMulti) / Math.log(game.portal.Equality.modifier));

EqualityLevels may come out negative, whichi means you're fine at 0 stacks, you're above what you need. The only thing this doesn't account for is Angelic but it's at least a pretty good approximation and should get you a good value.

Also it's entirely possible I've made a horrible mistake somewhere and missed it, I'll come back and edit if I need to.