this may seem simplistic, but what about trying (something/anything) to maximize what few skills this team has - playing a true "5 out" offense?
there was a time in the early 90's when the warriors were good (run tmc) but not as good as better, bigger teams.
so in a playoff series where the spurs (pre-duncan team fearturing robinson/elliot) were a "2 seed" and the warriors were the 7-seed, there was absolutely no chance that the warriors could win that series.
so nelson devised an offense with tom tolbert at center, bringing the ball up (point center) with the other four spread out around the three point line.
the spurs could not double without leaving a shooter open and the spurs never solved their problem (warriors won the series but were eliminated in the next round).
marvin seems to consider himself a good ball handler, as we have seen him attempt to go coast to coast rather than rebounding and looking for an outlet (giles started as a point guard - don't know about baggy)
but what about marvin slowly bringing the ball upcourt, in the center of the court, outlet wings on each side (if necessary) but forcing opposing bigs to make a decision - come out and guard him before he reaches the three point line (or all the way upcourt, if they choose) or hang back and protect the rim (leaving marvin a wide open three).
if the opposing big comes out, could marvin make a quick exchange (to get a fresh dribble and the ability to drive in any direction) with fox or hield and drive to the hoop, beating slower bigs with his speed (and ball handling ability - if he has those skills like he appears to believe he has)?
or, if they hang back, if he makes 2/3 threes, they might HAVE to come out.
spreading the floor and going one on one would seem to offer an opportunity
and if you get everyone spread, passing to fox and allowing him to go one on one should be an offensive plus.
i mean, you have to look SOMEWHERE for advantages, right?
barnes and tyrese in the corners, buddy and foxy on the left/right up top, all four behind the three point line - how would defenses react?
if someone like nurcic comes out to guard marvin, he should be able to drive to the basket or find a teammate cutting to the hoop, IF he really has those skills.
but i think we know his postup game is a work in progress and you have to find a way to spread the floor enough so that buddy can't be doubled up high.