Zealots require max block and high defence to be any good. AR comes next. Besides. At like lvl 94 with 1 point into HS, Naquadah needs only 134 dext to reach max block. Btw, 1 pt into hs makes HS lvl 28 wiht + skills. I havn't made a zealot before, but I'm assuming your going to want to max HS, so you'll need even less dext then Naquadah does.
Remember, 3.5k life goes away pretty damn fast when your getting hit 6/10 times ^.^