I can give some background on what I've seen with /Martial Blasters.
Mazus Aquablade was the only one I saw using it in KBs, but due to not slotting it for range, not using a powexeclocation macro, and pairing it with the unconventional Water Blast, it didn't gain any attention. Most people saw /MA as a joke due to the lack of Build Up. I saw him teleport mid-spike and it caught my eye.
I played with the set on the test server and made a video showcasing the teleport with max range/powexeclocation macro, which I then posted to the Renegades discord. They immediately started PLing about 5-6 of them (before AT limit was agreed on).
A couple days later I saw Dan Petro using a Beam/MA in one of Poned's Siren's Call events. He was chasing people with it effectively.
Next day after that I saw ESP using a Psi/MA/KoB blaster in RV. His line of thinking was he could teleport to targets to KoB them.
Then my Psi/MA hit 50, and I started using it in Kickball as Red.X
It's been fun watching /Martial go from a joke set (which I excluded from my original RV tier list) to what I consider to be top 2, between teleport, breaking CC, a heal, +absorb and perma +40% dmg/+15% tohit.