Bo Barb has not a lot of MF, but when I switch to my Double Ali Baba things change. Thats all you need in terms of mf.
https://forums.d2jsp.org/topic.php?t=108846598&f=148Discussing this matter in this topic
There is no such thing as too much MF, I understand why you would want to stay away from too much hustle,
But unless you 3rd char already has a role except filling like Chant sorc, making a full MF/Ultra high Find items chance Barb would still benefit, and not change anything for you gameplay wise, except you gotta lvl up a char.