Is there a certain MR threshold where you can start rounding out other resists?

[supermonk]

As a monk, what is a good MR number where you can start focusing on other resists such as CR/FR when pulling?

If I can surpass 200 MR, (let's say I could get it up to 220) would it be more worthwhile to sacrifice some MR gear so that I can get FR/CR up to 200+ as well? What's a good FR/CR number to where I can resist a decent amount of Fire/Cold nukes? 200? 225? 240+?

If I can sacrifice some MR gear, I can get 208 MR, 242 FR, and 235 CR. Else I'd be like 225 MR and have CR/FR around the 200-210 number.