Need some input on SWGOH Math and damage calculations

Ok so here is my understanding of how damage is calculated. I'm going to leave out defense for now and assume that it is a crit.

BaseOff + (BaseOff*%OffModstats) + (BaseOff*10%OffsetBonus) + (FlatOffFromMods)
=
PostModOff


PostModOff
*
(1+%LeaderOffbonus+%OffenseUpBuff)
*
AbilityMultiplier%+(%SpecialAbilityDamageEffects-%SADE)
*
CriticalDamage%


For the SpecialAbilityDamageEffects I'm referring to abilities like wedge's basic that adds 50% damage to defense down targets, and on the negative side i'm referring to things like the attack being a part of an assist from cody's 212th attack where the damage is reduced by 40%.

Here are my key parts of the equation I am unsure about:

Is the Offense up buff bonus additive to the leader offense up like I have it, or is it a seperate multiplier?
Are special ability effects a seperate multiplier or are they additive to the ability multiplier like I have it?

If there are multiple special ability modifiers, are they all seperate multipliers? For example, If you have a wedge assist from 212th on a defense down target.... Is it 1.35*1.5*.6 or 1.35*(1+.5-.4) ??

Any ideas or insight?