Ha! You have it right there - a Polymath and a pair of Triptychs are exactly I went for. Spent a while asking advice from both Aristides and Tim @ BKP and that was the verdict. Now for me the Polymath is a little less intense (?) than I wanted ( I am usually high gain ) but it is very clean and well defined so it may well be ideal for you. It's lower output and does better match the Triptychs. The single coils sound like singles but not especially chimey like a vintage strat .
For me I far prefer the Silos I chose for my H/0. But had noticed a few customers being less impressed with these and suspected I'd made a mistake - no way - they are excellent (thanks Rabea

).
So there it is. As always YMMV but the Polymath Triptych combo does seem to work.
Speccing a build from scratch is a great thing but it introduces all sorts of variables not seen in an off the peg build you can just return. Worst case scenario is you can pretty readily change a PU if it doesn't work for you.
Hope that helps!