I've hammered on this point over the years, and finally we have the proof
https://www.ncbi.nlm.nih.gov/pubmed/19811949
The study looked at subjects who used 1, 3 and 5 minute rest intervals between sets. It's pretty clear that the longer you rest between sets, the stronger you'll be (up to a point).
5 minutes beats 3 though, and the difference wasn't small. I'd further suggest that resting 10 minutes you'd see an even bigger strength increase. These were full range movements, but I'd bet good $ that resting 15 or even 20 minutes between static holds would find even bigger strength increases.
MORAL OF THE STORY: When you're working through your loading patterns, static holds etc in Blueprint, take your time between sets!