And thats what my concerns is about, cause where can you get better mods than the ones in pvp gear? The only mods i know about are the ones dropping in operations. Thats why im wondering if doing operations is more beneftial than it should be. i guess it comes down to how much better the replacemnets mods are. If you get 200 more endurance it will give you an aditionally 2k health! Sounds beneftial enough to me, and when those mods also have strength (if ur a sentinel) and other bonuses it sounds like its worth it.
Use power crystals instead of expertise ones because they trade at a 1:1 ratio, and that's pretty much all you need to do.