It's worth keeping an eye on blue guns for PvP. I keep a locked blue shotgun in my vault because it got me through some quest or other (I forget) when every purple shotgun I tried was absolutely horrible.
Bungie's great strength with gunplay is "feel". Never under estimate the advantage you get from a gun that just "feels" right.
I also see people doing incredibly well with rare sidearms and snipers.
Blues can "feel" better than the stuff we don't dismantle without looking at them.
Don't tell anyone 😄
I got a pretty close to god roll one from managerie. You want either killclip, rampage or swashbuckler rapid hit and high cal with a range masterwork. Mine was full auto though no high cal but the full auto is murdering people.