Do not take any of the gold buildings past level 1 for the start. Imrik does not actually need the dragons as badly as the doughnut but will if he has to face down Grimgor mega stacks. Dragon/Army buffs can come later to max out your doom stack.
Imrik skill towards sweet personal buffs (2 influence per turn one ASAP).Upgrade second settlement for 450 gold dragon building (not main one).Destroy both small buildings for 100 gold.