There are a couple options available to get Tier IVs without dropping a huge amount on just one. Transmutation is one, but it is 5 meaningless/cheap Tier IV per random chance. Another option is if you have specific crafting high enough, spirit bonding lvl 70+ gear has a higher chance and more consistent rate of turning into Tier IV, but again this is random on which you will end up with. At least after you get all those bonded Tier IV you can take and try transmuting them too ~shrugs~ Just pointing out other options I've seen people do.