Nergal’s cap like any ship is always an issue.
But remember Trig ships all have those remote armour repair modules bonuses.
As for CAP issues, most come from incorrect fitting or over ambitious module fitting.
I have fits that a completely unstable if you use simulator at its default, mainly because it turns everything on, with the only exception being cloaking modules. So MWD/AB active with shedge/bastle modules is common, when these shouldn’t be.
The trick is to manually turn off and on modules that should work together or shouldn’t be active due its design.
Also remember in combat AB/MWD are only used in short bursts, the only time they are used for longer is to get into combat or out. Its a common misconception to leave these module active. Its also true of other modules.
There are a lot of modules that only need to run for less than a minute, if you have to run shield boosters or repair modules for more than 2 minutes you’ve mounted the wrong one for your fit or your fit has a weak tank.