We do not need new powers based on a percentage of the power you already have (unless that percentage is not the same for everyone, meaning the weak get a dramatically higher percentage than the strong).
I like scaling a LOT. Low investment should mean low performance. There is a certain base level that is required, but a first life melee can (without SOA or L.SOA) solo rolf-stomp through R1 quests, run Hard raids, and join high reaper quest runs. Newbie has issues beyond 1st life, but that's normal, expected, and GOOD.
BTW, my debuffer has ~370 MP and that doesn't make L.SOA magically good. L.SOA
utility scales on build features, not MP.
IMHO, Salt+Chains builds are going to be the really big winners for solo + L.SOA. It's absolutely an unequal gain in utility, but the gains are from either happenstance (ie. you had a build with those before L.SOA) or deliberate build leveraging.
I'm going to try it on my
dodgy tank. It has ~50% dodge, DRoll, Feast, Guard-Up, IU/Dodge, & ~300 MP. I haven't bothered solo'ing past R4 with it (too slow, but R4 is a yawn without L.SOA). I suspect it will top out around R6~8, but adding Salt will likely permit solo R10.
Honestly, I still expect SOA to be completely removed from game, but not because "OP". It's because of the pressure to zerg from the 10s CD. Melee in quests are going to rush hard from pack to pack to keep their stacks. I started doing it on about the 3rd quest with L.SOA. The "omg stop zerging" squealing is going to be LOUD. It's just a matter of how long it takes for the devs to hear and respond.