Total anecdote, I had nothing but problems with Polymaker ASA, which I believe was me trying to run it through too fast. i have a dragon UHF which is, in theory, supposed to be able to do speeds over 30 mm^3/s, first thing I'd try is just slower print speeds and then bump it up from there.
You could also look at a cht nozzle, but as a word of warning, I found the bimetallic ones super fragile, if I recall they want a way lower torque spec than a solid brass or steel nozzle, so they're easy to shear off if you're not careful.
Edit: Leaving the original comment, but I think I may have mixed up for esun abs plus.