Can someone explain the different types of damage reductions?

[Lampros]

I see "Hero" damage reductions, as well as "Invulnerable" and "Feel No Pain." Are these all the same things in terms of game effect and thus interchangeable? And do they all stack?

Edit: So for instance, Captain has 50 percent Hero reduction and 50 percent Invulnerable. How does this calculate in practice?

[Stardustfire]

each reduction type stacks with itself. exeption is one reduction type where only the best one count, the one that says "up to X%"in its explanation (when i remember correct it was feel no pain) . all reductions work together.
you have differences because there convertion table was made that way. most of this reductions in Gladius are made up from unmodifyable save roles in TT. in TT you coud make one role to save a model in newer Editions (in SE you coud use all, one after another) so its up to you what role you use.
and they taken all this Saveroles and made them into hard number dmg reduction.

[ShiroiWolf]

Originally posted by Lampros:

I see "Hero" damage reductions, as well as "Invulnerable" and "Feel No Pain." Are these all the same things in terms of game effect and thus interchangeable? And do they all stack?

Edit: So for instance, Captain has 50 percent Hero reduction and 50 percent Invulnerable. How does this calculate in practice?

From the fandom wiki:
https://gladiusrelicsofwar.fandom.com/wiki/Damage_calculation

Abridged version:
- Individual Attack DMG x Accuracy stat (Damage Loss if below 100%, Increase if above 100%). Reduce Armor from AP, then use remaining Armor to calculate damage remaining to be blocked
- Now calculate total Damage Reduction from other sources (Cover, Invulnerable, Feel No Pain, etc), reduce damage a second time.
- Apply remaining damage to the model hit by the attack.

[Lampros]

Thanks, guys. I am still clueless, however. Maybe it's the appearance of mathematics that is stumping me ;(

[ShiroiWolf]

Originally posted by Lampros:

Thanks, guys. I am still clueless, however. Maybe it's the appearance of mathematics that is stumping me ;(

This is why I don't bother with the math and go with "Estimated result numbers look good, lets try that"

My guess is, using your example of -50% Hero, -50% Invulnerable, it may be run in sequence? (Reduce remaining damage After Armor by 50%-Hero. Now reduce that remaining amount by 50%-Invulnerable)

[Stardustfire]

never looked into there strange formulas, but guess the several save roles are multiplicative instead of simple aditive and there is a min dmg% threshold you cant avoid. when i remember correct armor for example can max counteract 83% of incoming dmg.

[lx]

dont bother with this.
you can use enemy units like yours, for damage preview.
usually you need to use the best units available and have all kinds.
no minmaxing needed.
the more of it, the better.
after a few games you will learn how it works, without the need to know specific mechanics.

my guess is that they are added together, just named as from different source.
but then how it calculates... i dont care, as it does not matter to me.