If youean Obsidian, Heimdall on Linux is a pretty excellent alternative, you just need to be specific about which partitions you're flashing
Install GMDX on top of Deus Ex.
Yes, that was something that, for some reason, helped compatibility - there's a launcher that's bundled with it.
My plan is to complete it, slowly, then go from the start again with the Revision mod.
I've just (re)obtained a desktop PC with a GPU, which I'm using as a Linux gaming prototype box with ubuntu 20.04 LTS running Steam, and I'm reliving some youth in playing through Deus Ex (properly, stealthily). Enjoying the fact that Linux is doing it pretty smoothly (with some initial setup headaches now overcome).