Well, since getting to Jad seems to be no problem for you, whatever inventory you use now is fine. I uses sara brews and super restores though. As for Jad, always put on range protect first directly after you kill the last lvl 360 in the pair. Then make sure auto-retal is ON. So, after Jad's first attack on you, you'll run directly toward him. This worked well for me with Jad only able to get in one attack on me off-screen.