One of the most tedious parts of this game that I find is having to sell crappy mods due to the mod cap. I hit it all the time just from all the free mods from events. Granted I don't have stellar mods, but I haven't concentrated on farming them either. I'm more apt to trying to find them in the store when I need something specific. I find energy refreshes more useful for farming gear and relic pieces. I am currently working on JML and SEE so I really don't have energy to spare on mod farming. Relic and gear requirements are too high to use refreshes on mods.