>>16283795>252AtkNah. You want to split HP and ATK evenly at most. You could even go 252HP, 4ATK if you want to. Crobat breaks through things with status and support moves, not sheer power. You need the health more than the attack.
Also, I personally think taunt is still a must on Crobat. Defog can remove hazards, yeah, but taunt will wreck stall teams. If you want, use them both, but I wouldn't drop taunt for anything. BB/Taunt/Roost is the core, then the other move comes down to preference or what your team needs most.