The physical processes that produce the solar wind and the rich set of phenomena associated with solar activity are still highly debated and their understanding is a prime research goal in heliophysics. The latter is at the dawn of a golden age with the imminent launch of the Solar Orbiter, Parker Solar Probe and PROBA-3 missions, that will provide radically new observations of the Sun's atmosphere. Though each mission has its own specific scientific goals and promises great advances in our understanding of the Sun and the interplanetary medium, taken together the three missions will provide the first contemporaneuos genuinally 3D exploration of the Heliosphere. To make full use of the data provided by these missions it is paramount to develop improved numerical models and new tools enabling further tests of the various theories proposed to explain the processes driving the dynamic corona. This session focuses on the opportunities brought by these new missions individually and by the possible synergies between the highly complementary instrumentation in space and on the ground made available by the heliophysics observatory as a whole. We also solicit contributions that present recent model and tool developments useful to accomplish such coordinated studies and/or that point to currently missing assets that should ideally be developed before missions are in operation.