which is the armor that I should get with the planetary comendation? which is the name I am juge immortal. you tell me to do the heroic of the planets, Corellian and voss for example?

hello all I am a sith juggernaut, I just got to lvl 55 and i do not buy good armor for pve,now I'm doing Daylis in Makeb and mob hit me pretty hard. at this time I have custom armor and im using shield / absorb enha. i need your help tanks. sorry for my bad english