well, im a bit newb still but maybe i could help u a bit.
u can use EE armors for tank or soloing, if u want cata group and u wont be a tank, then use stats on armor and charm and EE on weapon.
the stats what u need depends on ur weapon, here a link for check the ratios:
http://ladderslasher.d2jsp.org/index.php?g=3u should use the high EE or stats u can affrod with ur fg (i ussually use betters when high lvls and the best could be the 55 ofc, but u choose there)
i hope this can help u even if im newb^^
if u have some questions abouth the ratio lmk and maybe i can help
gl, greetings Solo.