That is a classic Andro stack, not too much by any means, imo.
For the DHEA, I would prefer transdermal. Oral DHEA has a low bioavailability and a short half life.
You can of course cut fat while on 4-Andro. It doesn't change the laws of physics - calories in vs calories out - ya know
I would assume the cutting to go better with 4-Andro in that stack, than without.
At 255 lbs, you're either quite tall, super jacked, or you have quite a bit to lose. If it's the last one, then you would probably be better off cutting natty at first for some time and when getting closer to finishing touches, then add PED's (if desired).