If you want to judge only on the last 6 games:
Spencer: 16.0 pts (.493 FG%, .483 3P%, .800 FT%), 5.0 rb, 2.7 ast, 1.0 stl, 0.8 tov
Simpson: 13.7 pts (.395 FG%, .188 3P%, .750 FT%), 3.0 rb, 2.2 ast, 1.0 stl, 1.3 tov
Omoruyi: 12.7 pts (.516 FG%, .000 3P%, .526 FT%), 8.5 rb, 1.2 ast, 1.0 stl, 2.3 blk, 1.2 tov
McConnell: 7.2 pts (.380 FG%, .154 3P%, .273 FT%), 6.0 rb, 3.5 ast, 2.7 stl, 2.0 tov
Mulcahy: 6.8 pts (.341 FG%, .286 3P%, .692 FT%), 4.3 rb, 3.8 ast, 1.2 stl, 1.8 tov
I'd probably put Simpson as our 3rd best player over those 6 games - McConnell/Mulcahy also played very poorly down the stretch (shooting worse than their season averages from the field, the arc, and the FT line)