Sorry, but you can't run around claiming cleaves the solution to everyone's problems. Working on my DA% sword, I came upon people cleaving chigoes when I needed vermin. I asked to join them, they refused. Fast forward to needing plantoids on my scythe, see a group at mandies, they refuse. Me being there would not have hurt their gains, but on the other hand, dragging people around to do it just because you need it likely isn't rewarding to the cleaver/puller/healers, especially if they're already capped on merits.

Frankly, no straight up grind kill spree should exceed 300. The average person will likely be looking at a minute per kill and pull solo. Put simply, the requirements on a lot of these trials are over-valued for the end product. The only real justification for it was to give people "something to do" between updates, even if they loathed the process. I dunno, I'd rather go through 20 short phases for a weapon than 10 long ones. You'll likely be fighting different things, going to different areas, getting different loot, more than likely coming upon people who WILL invite you, and so on.