doesnt matter so much at all cause you are not dps but go holy if you want improve this low dps a bit.
earth - just everything xd water - harnak 3, istina fire - fortuna, kartia 90 dark - zaken (?), kartia 85 wind - some gog mobs imo for pve 85-95 most important is earth, and is highly recommended having fire, water and some dark too.
no need at all untill 95 ;d many players skipped atr.. but they was expensive first months now those fragments allow to up.. so use what vexen told
doesn't matter on which part of the armor you put it, just: 2 parts with pve attribute resist 3 parts with pvp attribute resist.
yeah but there are 6 elements and 15 "slots", so i cant distribute them evenly, dunno which element i should put more and which less.