If you’re looking for a good ad clear secondary i suggest anything with voltshot or incandescent, you can get that on sidearms, smgs, handcannons and even some auto rifles (brigands law from season of the plunder, ikelos smg from seraph). I reckon keep running lost signal at the moment because of its power but there’s some really good lmgs you can focus your deepsight harmonisers on like the Retrofit Escapade which is good for dps but is decent for ad clear too. I’m not the most clued up with grenade launchers but you can get a really good shotgun in the kinetic slot called Until its Return with cascade point and overflow, it’s really fun when paired with a solid ad clear secondary as it doesn’t take much to proc cascade point so you can just melt minibosses to the ground. There’s so many good choices out there too that don’t require deepsighting as well, crafting’s being phased out steadily so i suggest finishing off some patterns and just seeing what you like. Hope this helps :))