That's advice of the year (I think I remember doing that before but forgot.)
Yeah.... tap the boss. No losses, just have to get by the Trolls when they get critical strike.
I just had to watch every battle, but yeah, it totally worked, thanks.
The only prob is that with all the trial and error, I've gone through the 4 or 5 free keys, and only have 167 out of 300.
I've got FC for 2 almost 3 FC keys. But it seems to avg out to 30 battles per key. BTW, I have all the relics (just need some for warrior & gunner, which don't apply here.)
Run time is avg. 1.5 to 2.5 per. Shortest was 1:04... longest about 3:00.
I gotta come up with a 4th key, and that will be close. I learned from the Trooper event, to go ahead and do the dungeon during the event, cuz NF changes things after, plus they cost way more resources, and you get behind cuz there is always another event lurking around the corner. I'm glad I got Major Malakhov .... I see no time to ever go back and catch up. Plus, gauntlet, pvp.... all in all it's a full time job.