I bought the BP 88 166cm
Seems like your lengths are backward. The narrow ski for eastern ice is the one you should be skiing short. If you're going to bother with that kind of a ski, I'd suggest one that's really made for ice. The BP 88 isn't that.
For the soft snow ski, try something in the 160s but with an easier flex. (Your older Samba is pretty beefy.)
I'll let others weigh in on specific models.
Have you had any coaching in the bumps and trees with the goal of relying less on quick pivots and more on scrubbing speed through the whole duration of the turn? That could allow you to keep the skis pointed down the hill more of the time, making short ski length less critical.
My two cents.