Friendly Neighborhood Ronin

All 58 Bond missions across every ally you recruit - the big completion gold and one of the two real time sinks. They open as you build bonds and push the story, so knock them off as they appear rather than leaving a wall of them for the end. A few belong to allies you only get on one faction path (e.g. Farewell, Black Cat), but the Testament of the Soul lets you replay the other path's content on the same save, so all 58 are reachable without a second playthrough. Overlaps heavily with Social Climber.