Think of Resistance and Defense as mitigation that always shaves a set percentage off all incoming damage.
Regen doesn't work by percentages, it doesn't care if you're taking 500 damage or 5000 damage, it'll still only provide you with a set amount of healing... Go over that set amount and /regen begins to struggle badly.
If a very powerful enemy attacks a scrapper two or three times in quick succession, a regen will be be eating pavement while an INV or SR will still usually be standing and can grab a friendly heal.
Dark Armor works a little differently... it has a mixture of healing, resistance, +defence/-tohit and mezzles. The nature of its auras makes it stronger against several lower-rank enemies and weaker against a single higher-rank one. However because it can achieve decent resistances (about 54% S/L resistance with Tough iirc) it'll still be slightly more survivable than a /regen against stray AV attacks.
Still think you will need too be a bit more precise with figures to do it though, I have tried Defence sets and regen before, as well as res sets, both feel around the same to me, with the regen probably winning out due to the ease of play to be honest. The only gripe i had with your example is mainly due to your example only having a 10% differance in health gaine due to regeneration, and we all know that a regen can gain it back much quicker, so it seemed a bit silly to myself that having 1000 hp a regen would only gain 100hp over a SR in 60 seconds.
Also with a def you have to take the rough with the smooth, sometimes lady luck rolls with you, sometimes a faceplant is a moment away lol, with a regen you know the damage is incomming so plan accordingly.
Not arguing, just stating plain facts based on what i've played in the past.
Personally, I feel the main difference between regen and almost any other scrapper secondary is that regen is clicky whereas the majority of the other secondaries are toggle based.
Of course, there are toggles in regen and there are clickies in the other sets, but on the whole Regen involves more clicking/key stroking.
~DA - 2 clickies
~Regen - 5 clickes
~SR - 1 clickie
~Inv - 2 clickies
(According to my quick look in the manual which I know is out of date slightly)
So I say choose a secondary based on concept and play style rather than what other people think is the best or most survivable. If you ain't a quick clicker, regen won't be as efficient for you as someone who is quicker with the mouse/buttons.
An opinion, as usual.
"Pride is all well and good but a sausage is a sausage"
For Lent I gave up...
Hope
Don't forget, the one of the benefits of /SR's single clicky is that it's also their mex protection. You can't detoggle a clicky, and you can set it to auto quite easily.
Defiant 50's
Many and varied!
@Miss Chief
Im not arguing that /Regen or /SR is superior. (Although / Regen, to my mind, is superior solo).
It is, however, important to discrinate between how heals (flat) and defence/resistance (proportional) damage mitigation occurs.
Bear in mind that /Regen will probably have some proportional mitigation (resilaince or maybe tough), and /SR will have some flat mitigation (natural HP regen).
Exactly the same principle applies to extrenal heals (from an empath or other healing power) vs Force feilds, Sonic shields, or even debuffs.
Yeah, but if you're just reducing damage, not halting it, then your HP is still going down one way or another, as it will with regen.