These will be for use on Sony A7R II and IV and possible 100Mp FF chips which I guess must be coming. With adapters a lot of mount choices are possible, I'm already using a mix of Sony, Canon and Nikon, and a Mamiya.
My needs are in reverse order of importance
Desirables
1) Resolution from 5.6 to the diffraction limit, excellent edge performance
2) CA and other aberrations minimised
3) Low weight and small size
4) Price
Don't cares
a) Manual AF
b) Bokeh, minimum aperture
Essentially I'd like to get as close as possible to the optical performance of my manual Schneider lenses on a digital back for deep field images
I already have in my kit
Canon 24 TS-E II (seems pretty good an A7RII, can I better this, any thoughts on likely performance on 60Mp chip?)
Canon 17 TS-E
Sony 35 f2.8 FE (this isn't good enough at f11 into the edges, but its not at all bad, I'd like to improve on it)
Adapters for Nikon/Canon for Sony
An initial search is suggesting to me that the Zeiss Loxia 21, 25 and 35 are possibly the best options.