Worshipper – “Ship” [Campaign 2, Mission 4]

and that's what I did. On turn 3, I captured the elven castle on the right and then rushed to the Dungeon. After building up there a bit, I went to the right and up, where archdevils join near the exit to the surface. The elven castle is captured without any problems, although shortly after the capture, an elven hero arrives. Then, along the path to the left and at the corner near the turn to the top, an infernal hero brought me reinforcements. In all cities, you need to build as many elf dwellings as possible to feed the dragons for passage.