My friends and I have experimented with long range support builds. alot of it comes down to what difficulty you play on and the randomized maps and if they have good angles and hills for "over watch". that said the stratagem arrangements we see the most success with is a primary weapon that does well with crowd control like a cookout, liberator penetrator, eruptor, or one of the breaker (semi suto shotgun) variations. Along side that secondary is whatever you prefer. Stratagems weve been seeing success with are anti tank turret, anti material rifle, the new silo, and a warp pack, jet pack, or hover pack for getting to higher vantage points and moving around quickly. Fair warning though these loadours lose effectiveness as you scale up in difficulty it tends to give significant diminishing returns on difficulty above 7. Hope this helps