It is not impossible to beat his second form in the mid 40s. I did it with all my chars at 43. I used the neophala or whatever + remedy on enkidu right at the start then worked it over. Gilg himself was tough and took quite a bit to kill. I only used one quickening chain at the end when he goes immune to dmg but didnt kill him with it. I used about 20 Xpots and 25-30 downs or so. Great fight.
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