From what I've read here before and my experience (I've been doing PL for the last year) BB and PL train abs differently. In BB the idea is to train abs without adding bulk, to maintain a slim waist. In PL, the idea is to add as much strength AND girth/mass as possible so you have a stronger core, and wider center of gravity which will help you lift bigger.
That said, if you're bulking and training abs for strength I'd recommend land mines, ab wheel rollouts, woodchops, anything that really builds up your core. Seems as though you're not concerned about "losing" your abs, so just train them hard every training session and they will get stronger.
Also, check out StormTheBeach's ab exercises..