As part of the Re-imagining Technical Assistance project (2018-2021), co-creation teams in the DRC and Nigeria developed design principles for good technical TA, which were synthesized and organized into a framework of four domains of change. Each domain of change included a set of design principles that address underlying issues while recommending actions for change. During the second phase of this initiative, these principles were updated to leverage insights from the system mapping co-creation process. Notably, we added a fifth domain of change — prioritize equity — to elevate this as a critical element for change. These updated principles serve as a starting point for continued co-creation.