Once a handful of people are using Brainstorm, you’ll have the option of syncing with them. If you don’t know who they are, sync with whatever relays that you know about, like primal or damus, and them switch to decentralized relays once your WoT tells you which ones exist and can be trusted. With Brainstorm, the initial baseline GrapeRank WoT scores are to sort the real users from the bots, nothing more complicated than that. Nothing contextual, doesn’t require all that much data. For now, I’m using follows, mutes and reports and those can sync up pretty quickly. Once the bots are filtered out, you can start to build a few contextual trust metrics, and one of the first will be trusted relays.