I've found that plugging in an external display on my 2013 rMBP (Geforce 750M) has massively reduced the crashes even at full resolution textures. Before if i played on the laptop screen (at 1440 x 900) it would crash every 2 or 3 scene changes. If I plug in a monitor and run at full HD and it lasts many MANY more changes / several hours of play (it does still crash occasionally but it is way more than the 10-15 play times of the built in display usage).