(not set in stone just cool ideas)
Establish a permanent link within the triumvirate, we will always know where the other two are and be able to talk to them telepathically even on different planes. This is a defense against outside influence and against any one of being corrupted.
Transform Xandrick into a bichromatic dragon, silver and red, through the use of true polymorph. He then con
Announce or ascension to the world and the relay our story. Emphasize our being saviors of humanity and how the other gods plan was to grind their souls into a fine paste. We will not outlaw other religions, instead we will encourage worship of the triumvirate and provide tangible benefits. Empire infrastructure, protection for powerful extraplanar entities and potential travel.
Begin consolidating our power on this planet and then begin extending our dominion in the prime material plane.
Yoryuu will be a harbinger, leading our invasion forces against other worlds and wiping clean those worlds that are beyond saving. We will continue to attempt to subvert the cycle on these worlds if possible and bring as many sentients as possible under our domain.
Souls from the prime material plane will be captured by our own pseudo-heaven baring a collaborative effort from the pantheon.
Pursue interplanar travel and trade.
Pursue a treaty with the pantheon that recognizes the sovereignty of humanity.
Some specific scenes are interesting to go over in epilogue but this is a group decision.