Offline Media Workflow

Basically, I'd really like to ingest media from tape of any size (1080p 23.98, 720p 23.98, 1080i 59.94, NTSC, etc) having it captured to OfflineRT (or some 35% quality Photo JPEG) immediately (no transcoding after capture) edit with it, and online much later in ProRes.

I know there's 100+ reasons why I wouldn't want to do it this way but I'm really looking for some ideas/answers/experiences and people who have succeeded or have thoughts on how to succeed at it.

I work at a place that gets hundreds and hundreds of hours of UNfinished feature footage and interviews that we just have to cut with. We VERY RARELY go back to the same footage or even the same tape. So it really wouldn't be a savings of time for us to cut with ProRes so we can finish quicker with ProRes. We really don't use the same video. The stuff we ingest on day one has burn-ins and heavy compression whereas the stuff we online with on day 80 is pristine.

We come from HDCAM and DigiBeta. Sometimes even P2 and RED. We've got a mixed flow and a TON of media shared between a dozen editors. I'm more concerned with how folks are getting it in at an offline resolution on capture. Is this even possible?

I've experimented with the ioHD and the MXO2 and while both are amazing at handling the ProRes side, neither can help me get the capture in at my desired 320x240. The MXO2 will even go as far as letting me capture PhotoJPEG but it will only let me do it at the native dimension of the footage (1080p comes in at 1080p PhotoJPEG). This is nice to an extent but the real benefit would be the scaling too. The MXO2 will also scale within the same cadence (1080i 59.94 to NTSC) but it won't go smaller than NTSC and definitely won't let me go 1080p 23.98 to NTSC.

Any thoughts? Ideas? Anything you've experienced or hardware you've had luck with would be greatly appreciated!