Don't do stuff on Mercury. It's bugged, so just stay away in general for doing rally stuff.
For the high value targets, are you opening the chest they drop each time? The ornament is not for actually killing them, but for opening the chest. If you kill the target but don't open the chest they drop, it won't count towards the ornament.
English
-
Yea figured as much for mercury. Yes I always opened the chest for each high value target I got
-
That's weird then. I didn't have any problems with things counting, and I still felt that was the grindiest (it's a word, I swear) of the ornaments. I was glad to be done with it.