for starters, I think you are way too light for ur height. at 5'11, you should and would be better off training naturally b4 you supplement...(if you know what i mean). i think your good for about 15-20 more pounds in you, and would be much more pleased with your after cycling results if you wait until than with the proper PCT..
however, if your mind has been mad up already n ur adamant about cycling, than i wud stay away from dbol only of deca only cycles.
why dont u look into a test and deca cycle for 12 weeks so ur HPTA isnt shut down as hard with deca only, (let alone, ur sex drive from the infamous deca dick)...
some nolva and clomid would suffice for proper PCT also, proper diet, and throw in sum intense training along with sound sleep every night and u create a perfect anabolic environment for growth.
GL