Taken from Discord "Builds channel".
Open with Flashpoint, pop Ice Beam, drop mani, 1 secondary ability, unload Mjolnir, 1 secondary ability, then upon repeat Ice Beam first then Flashpoint, mani, etc....
Its important to note Flashpoint is only first on engaging the fight cause you have no heat and you want Ice Beam to hit hard. After which, it's the same rotation, but Ice Beam first, Flashpoint second.