Fusion worked ok last time I tried although ShapeShifter works better (very stable although there are incompatible Mac programs). My setup...
AmigaOS 3.9 BB3 on 3000T (but similar worked in a 4000T too)
CSMK3 68060@75MHz
Mediator 3000T/4000T + Voodoo 4
My S:Startup-Sequence starts like this...
BlizKick Devs:My3000.ROM QUIET
SetPatch NOROMUPDATE QUIET
Failat 21
MuFastZero MOVESSP ON
I use my own custom AmigaOS 3.9 "conservative" ROM image and the Mu 68060.library (on Aminet). There is ShapeShifter video drivers in the Mu package which work well in P96 and supports CGFX as well called MuEVD. I believe the FusionReserve is not necessary with a newer exec.library or by a setting in the CyberStorm boot menu using escape. I don't use anything like it.