I'd say 200 should do it just fine.
By the way, although it doesn't really hurt to have more, a 12,000 lb winch is kind of excessive for a small YJ. The standard is 8000lb. Don't know how much more a 12k winch would draw from the system over an 8k winch.
'93 YJ, 4.0, AX15, Aussie locked D30/open 8.8, 4.10s, 2.5 OME lift, 31s...