Eh, Choppa has high potential, just need careful play and not going full "I see red better charge in and die" playstyle that seems to be common...
yesterday in TM
Tactics, Str + Str/Ws + 9target lotsa + Wot Rules
I know it might not be best, but having Wot Rules allows me to use other buttons than Lotsa Choppin spammer, and at this point I'm very worried that my F-key in keyboard will break if I keep using too much of lotsa choppin (where its bound for me).
Furthermore, after 5 sec of entering combat, you enter Yellow. This gives +75% dmg modifier to Wild Choppin, and you have 10 seconds of combat to launch about 5-9 Wild Choppins for good burst (and AP pot because choppa always out of AP)
Also drinking AP pots like an APholic, having option for finisher to recover tiny bit of AP helps... 100 gain, 25 cost, actual gain of 75, well better than nothing I guess - obviously not as good as rampage, but I have it in hotbar anyway, even if 9 out of 10 times I use it in pve (damn mobs stealing AP).
GTDC is kinda nobrainer fight opener, you might pull 1-3 ppl as warm-up exercise, help your WB gain some morale, then fully engage. YerBleeding DoT out as much as possible, doesn't do high dmg but I guess every extra pressure helps (said ability should be doing much higher dmg, the DoT is laughably small portion of total dmg).
Subju proc weapon, city dungeon proc weapon - BS weapon for 5% extra dmg will help, though I don't think its gonna make massive difference, your mechanic gives you 50% so another 5% to get to 55% is very marginal gain.
Though I guess most of my kills come from finishing targets Sorcs have softened up - then launching Bring It On during "mop up" phase of the fights, while also using GTDC to pull in last strugglers while you/allies finish them.
I agree that many trees have "meh" to outright bad abilities/tactics. But so does Slayer. GTDC is the most highly valued thing on Choppa right now, without it, well, don't really see much reason to bring a Choppa into WB at all. Sorc does more dmg and higher dmg pressure, and from further away, and can bomb/pressure while kiting and at keeps too, whereas I just park my choppa in some bush and wait for the siege to end. Mara has wider toolkit and their dmg pressure is also very decent.
Would probably want to see some kind of buff to the weird 5pts "pve finisher" that gives small AP back (pots are higher gain lol).
Giving much more dmg risks causing imbalances. Giving more arm pen also might cause imbalanced. Rather would see more warband-valued tools in their AoE tree. (although this is problematic on Destro, since you have very wide variety of tools spread over BORK - dpsZealot - Mara - meleeSquig[RIP] - Chosen)
2 out of 3 tactics in AoE tree are also just terribad. 11pts is a joke, compared to other AoE class trees with 11pts tactics like BW Wildfire (that crits lul) etc... AoE snare being between 10-20-30-40 is also kinda weird, since it's random should at least be good random chance, maybe 20-30-40-50. And maybe turn CF! into dmg ability, so you could both do dmg and reduce CDs (just as Slayer does both dmg + increase CDs with Shatter Limbs, and BORK does dmg with WAAAAGH and reduces CDs)