depends on wether or not you are stacking 1 person really hard, if you are advancing 1 set would probably benefit you the most. If you try to keep a balanced team you should upgrade other sets too.
rambo1998123 replied at 2017-11-9 13:30
yeah forgetting to socket is a pain if you upgrade past fire
i have 7-9 sets(i use a 7person scheme)and i balance all-jst 1 asualter needs sockets for starting 5 to be fuly socketed-do before going pass firelord!!Fyi And yea ive wasted sme sockets and pieces upgrading 2-4 and not being socketed..worst mistake..Oh and to not i balance all but advanced hiki to azure so ur doin nicely..how are u on t1??jst asking u guys