Since I built my own dev tool to allow me to better organize and manage multiple sessions, I've found my flow state hits when I've got agents staggering to completion. Conversation with one, wrap it up, send my response, and another one finishes. I currently have 49 agent sessions open in atrium and when I'm grinding, 5-15 are going at a time. If I get em all onto longer horizon tasks, I start to comb through other sessions to pick up parked conversations.