H2 priests: Why, when, how?

[Jarkko]

So, I guess the consensus is that H2 priests are nice when you happen to get them for free (or find a site from which you can recruit High Priests even without a castle), but there really is not much point in recruiting them (unless they are mage-priests of some sort, when they could have other benefits). Basically what I've been doing so far anyway.

Thanks to all who contributed to the discussion!