MA Caelum: Options for the late game

[Carcaroth]

For some reason I have an attraction to unusual strategies in this game, as well as trying to get some of the lesser nations to work... but I'm completely stuck with MA Caelum. They have mammoths, and reasonably tough morale boosters to put with their mammoths. And...

...

Lightning bolts? I'm fond of both EA and LA versions, though for different reasons, but the MA version seems nearly worthless. There's more armor than your archers can handle, mammoths only go so far (though it is quite a distance), and your mages can throw down either battle magic, or given the setup Fog Warriors... on a variety of infantry that's going to die against independant HI. The kicker for a battle magic reliant mage army is the lack of communion, which makes dealing with armies with anything BUT mammoths a losing proposition for the most part.

Is there a particular dirty trick I'm missing somewhere? I've been cranking out staves of storms and owl quills, as well as the occasional booster for heavy lightning, and that's reasonable, but it seems like even Ulm has more options to play with than Caelum. For reference, I've mostly been using a W9N4 frost father, sleeping; Should I be aiming for Astral on my god, something like a WSN4 Lady of Fortune to try expanding out via the yazatas? Take heavy death and just site search? It's not that I think they can't win (after all, they don't have monkey PD) but more that I just feel like I'm missing something important. Especially against Jotunheim, where you might as well give up and send your gems to someone else.