Is it really worth it-Drk AF HandsFollow

Ok I just want to rant because this causing me so much grief. Ok I have been searching for the coffer chest in Edm> Nec. for almost a week now. I have a map of all the spawn locations.

I decided to take a break from it and go get my AF-body armor. Took me bout 15 minutes to walk up into Castle Oz. I turn the corner and low and behold there is the Coffer Chest sitting in water. I pop it and get my body armor. Total time 30-35minutes including getting to Castle Oz from Jueno. I was jumping for joy. (I also know its' bad to xp in but I have my Haubergeon that I use)

My grip is, is SE out to get me or something or everyone in this place. I have lost 14k xp in here in the last week and used almost 100k in oils and powders damn those bombs. The key is bad enough but what really pissed me off more then anything. The night before I see a 75 smn drop down with a 55 war to get the key..Two fights done and out. I have been fighting for 3 hrs and still no drop. I was like wtf. Yesterday I was on from about noon til 12 midnight. I see the same warrior come into Edm. Nel and within 10 minutes pop the coffer chest. I was like WTF.

Now I know I could level up my whm to get sneak but I don't have time outside of leveling thf, drk, and war and doing other quests. Should I just give up on my AF-hands.