Yup. No need to rush these events though. Keep in mind the conclave is going to last for at least a month of IC time. Due to the expenses, dangers, and difficulties entailed in organizing such a large traveling force across such deadly terrain. Just the need to rest and replenish resources along would demand a bit of time before each group is ready to ship off. That's before you even take into account the tricky nuances of negotiating treaties, defining borders, etc, etc, etc. So at least 3-4 weeks. Maybe longer depending on how the negotiations go, and what the travel conditions are like when everyone is ready to ship out and head home. Afterall, it's not like the local demonic forces are going to fail to notice that the major holdouts of resistance against them are all gathering together. They may decide that they have a vested interest in trying to nip this alliance in the bud.