For intumescent white cataracts, it can be helpful to decompress the capsular bag using a needle and aspiration/suction from a syringe. We have featured this technique before and even showed you an automated way of performing this. This technique allows us to lower the intra-lenticular pressure so that we can minimize the risk of capsular run-out in the classic Argentinian Flag Sign formation. When doing this technique, I tend to prefer a bevel-down approach so that the liquefied lens cortex can be more easily aspirated without grasping the capsular bag. This video shows the technique and you absolutely must know it.
Decompressing the lens through a paracentesis at the limbus may be better by maintaining a higher intraocular pressure than going through the phaco incision.