Primordial Saronite costs 22 Emblems of Frost on PTR so you actually need 550 EoF to finish the first quest.Originally Posted by Kujja
T10.251 costs between 60 and 90 EoF per piece (afair) and you NEED to buy the ilevel 251 T10 pieces in order to upgrade them to 264 and later to 277. So getting 4-pc-T10 alone will cost you 300 EoF.