defense against Fires from Afar?

Probably. Unless he gets lucky. You could also try putting up Domes of a different type (they overlap). A good one in particular is a Dome of Arcane Warding.

[Merry Jolkar]

Is it known what order the domes take effect? Solid Air breaks if it failes, so I'd prefer to have Arcane Warding be checked first, to avoid that risk.
Thanks, Merry

[archaeolept]

i believe they are checked in the order they were put up. so if you wish arcane warding to be checked first, you would need to cast it first.

[Graeme Dice]

Is it known what order the domes take effect? Solid Air breaks if it failes, so I'd prefer to have Arcane Warding be checked first, to avoid that risk.
Thanks, Merry

I'm fairly sure that the arcane warding dome won't actually fall unless the spell makes it through all the domes that are present. I can't be certain of this however.