1) bramble was proven worse even on p8 for everything, including bosses if you use IG because then he targets merc.
The tests that concluded that bramble is better are only true when using fire golem.
2) this IS a p1 to p3 build, and one of the best at it for mf purposes.
Trying to make it work on p8? Just play something else.
What in your opinion is BIS for P8 purely for kill rate/XP gain?