I know that it says in the description that it is hard, but Legion of Almire is HARD (considerably more difficult than Vanaduke, IMO). The main difficulty that I had was the respawning knights, which are quite difficult to kill. However, I have no problem with it being difficult.
After using about 10 sparks of life each, the two of us saw a lift to another floor and gawked. However, this floor was a treasure floor. I was thinking that our sparks of life were not in vain, until we opened the treasure boxes, and out popped T2 and T3 fire crystals (which are probably useless for anyone who is able to complete that mission). I don't feel that these are appropriate considering the difficulty of the mission.
Hence, my suggestion would be for T4 and T5 fire crystals to be in the treasure boxes for Legion of Almire.
they are.. if your rank is high enough and you do the version that starts at D24.
Sounds like you were still doing it on Tier 2.