I have 12 million for 6000 bench minutes so bench will at least be good enough.
From what I figure 60-70 % assists is the "sweet spot" the maximum needed to have best effect. I think more than that is...well, not wasted but money better spent elsewhere.
Hard to say with rebounds, They used to be the most predictable thing in the sim, now it is hard to say what will happen.
As far as efg% is concerned, considering all of open leagues, theme leagues, and the ODL last four times, the higher I drive it the shittier my teams are. Which is starting to **** me off just a little.