As a player that downed all the ARR EX primals exclusively through DF I found the challenge levels of Alex normal to be almost perfect for the average DF player, with the earlier floors slightly easier and the latter floors slightly harder.
V'aleera's Wiki - https://wiki.ffxiv-roleplayers.com/pages...eera_Lhuil
V'aleera's Tumblr - valeeralhuil.tumblr.com
V'aleera's Tumblr - valeeralhuil.tumblr.com