https://www.primedope.com/tournament...ce-calculator/
The calculator just got updated on 11th and you can calc yourself how many tourmants you have to play (based on the entrants number) to realize your ROI.
Basically saying, in volume, more is better, especially in high stakes tournaments that run way less than lower ones.
Standard BRM is 100 BI at least for normal tournaments, in turbos and deep fields (for example stars) 200 BI is totally ok.
Since it feels like your ICM game is not at the top right now I'd start with a more conservative approach and move up as soon as that is embedded.