I am certainly into the portfolio theory but my folio in the first month of Tradeview only consists with BRI-V2 at present. After some more trials, I feel you are right about trading two time frames at the same time to help cover the pullbacks. Looking at AUDCAD H1 & H4 for example, while the H4 has a reasonable pullback, H1 is still moving up so time frames sometimes hedge's each other.
So that's two accounts to trade BRI-V2.