My character name is Neon Samurai. Rank 31/47. I'm a Rifle Spy. I'm using a Tsunami Epic Assault Rifle with Explosive Ammo and Laserpointer. I have WL 89(with a +14) and RC 102 (+0). I am getting about 24k dex xp per kill on the monster I am fighting, which is what I always have gotten - and while Triple-XP was enabled, I was still getting the same amount. I am fighting a swamp strangler, rank 48 (yes there's sometimes a swamp squid, but I'm not counting that into the analysis, but it does bear out the original conclusion). The strangler is basically a meat-bag, I use it to test things out.