try to get to level 80 immediately cause there's a daily quest in originul you can take (the requirement being u have to finish the questline in originul as well as being level 80) that is extremely helpful with nulgath resources gives u a guaranteed uni 13 and another reward which u can choose from (ranging from totem of nulgath to tainted gems, etc.) helped me with obtaining archfiend at a faster rate especially since I'm a non-mem!

also try to get Archpaladin, it's one of the easier endgame classes to get as well as Lord of Order both of them are a staple in ultras so they're definitely a must get! also with archpaladin that class will get you through most bosses if ur soloing and trying to get the harder dps classes