Canson Arches 88 310gsm is a very nice paper, with a character i cannot describe yet.
To find the best possible printer-pipeline settings, i first test without CM the behaviour of the printer-paper combo, in my case the printers are SC-P9000's, using the Drycreek print utility and my own testchart.
Canson specifies use of VFAP , this turns out to be not the right media-type, as the pure black patch (L=0, RGB=0,0,0) appears to be ink-overloaded, resulting in a visible sheen (see picture on previous post) instead of a pitch black appearance. Measurements indicate this also. In such a case, the next media-types to test are USFAP and WCRW, as these have less inkload in the blacks.
With WCRW the black patch is really pitch black, and measurements give a value of L=13.7 - 13.9 . This is on par with the best black measurements on fine art matte papers sofar in my fine art printing practice (by the way on Hahnemuhle Photo Rag 308).
Added are also the results with the ICC profile i created: in PS the Abs-Col print, and in Lightroom the RelCol (by default including BPC) print (a print of a grey step-wedge linear in L in steps of 2%). In RelCol+BPC mode there is still good tonal separation in the bottom end, which is quite important in my view.
Print results of BVDM Roman-16 images show a very nice result indeed. (no picture, the limit is 4 ;-|)
Note: with the Canson Baryta Photographique 2 Matt 310gsm and the Canson Rag Photographique Mat 310gsm, using VFAP gives the same poor results in the pure black patch (L=0, RGB=0,0,0). This is identical on both SCP9000 printers. This behaviour in pure-black is not uncommon, it is related to the coating on the paper. And luckily Epson has several standard media-types covering the differences.