https://www.dandwiki.com/wiki/Soulkn...e_(3.5e_Class)
I guess my remaining big questions are if a discord is available now for planning stuff, and or if you would allow this soul knife fix or had a soul knife fix that you'd allow for this 3.5 adventure. I'm certainly not going to try running an as-written SK.
Fallback idea is for a barbarian possibly.