New clutch woes - help!

[Fazerider]

My next plan is to try fitting half Genuine Springs and half EBC, 3 of each, offset evenly, to hopefully achieve a happy medium. Anyone else done this, or foresee any issues with this plan?

I did try that, though I’d bought springs that were probably far stiffer than the EBC ones.
It stopped the clutch slip, but I found the lever action was still too heavy so went back to 100% OE. The slip is only an issue for the first few miles, once the oil’s warmed up fully the problem goes.
If your EBC springs are only 30-50% stiffer than OE a mix of 3 of each will probably be a good solution.