MA procs but you don’t notice it. Before the 126.96.36.199 patch, MA and Execution had the same animation (MA graphics is bugged ugly at the moment). So, visit a spirig guide and remove all but other default attacks (execution, quick cut, belgothian, whirl wind, …etc.) You should notice it then. Also, MA with 1pt will have a low probability.
Second, MA should proc with all default weapon attacks (melee or ranged) but not skills. This mechanics becomes unclear when several default attacks can be combined. I know that my blademaster’s attacks combine with the one of Shard of Beronath but I don’t know if they would further combine with fire attack. They should though but I’ve never tried it.
Thanks for the clarification. I had read about the MA bug, but thought that was a noticeable graphics glitch - I’m not seeing this btw, I only see the jump smash animation. Incidentally, attaching Scorpion Sting to it does help prove MA is proccing at least