Hi, Don,
Yeah, Kulthea/Orhan would probably 'share' their magnetic fields (as well as their Essaence fields) the same as the Earth and Moon do- assuming that Orhan has a molten iron core. And, the magnetosphere does most definitely help prevent all but the most energetic of the Cosmic Rays from reaching too far into the Earths' atmosphere. Some get through, but it's only a tiny fraction of a tiny percentage of the Sun's total output.
The order of gravitational effect on Kulthea, is most likely exactly as you've listed (Tlilok can effectively be thought of as part of Orhan's effect- as it's orbiting the moon, rather than Kulthea.) Although, Varin must be fairly dense- as it's orbit is between Kulthea and Orhan's- otherwise it might well have been pulled apart by the tidal forces between them.
Just the effect of Orhan's gravity would be extremely severe- given it's relatively close distance. (I certainly wouldn't want to live on a planet with moon that dense, that close...)
But, as Terry has written it like that, we've just got to come up with a rationale for why it does work- as opposed to why it shouldn't.
I wonder if the Kulthean's have got it wrong, and the frequently severe sea conditions aren't because Shaal is angry- it's because he's lost control. He's actually on Kulthea charged with moderating the sea's worst effects- but the various factors affecting the world can make him lose control, from time to time. Same effect- just the perceived and actual motives are the opposite way around. (It would also explain why he spends most of his time on Kulthea as opposed to on Orhan.)
All the Best,
Kevin.