Evil Paladins: How will they be handled?

[Minigiant]

I'd keep the radiant damage unless your deity is very connected to undead, the Underdark (the fey or natural ones), or the Shadowfell.

 

[Jhaelen]

I could imagine they might create a blackguard template to create elite monsters. Otherwise evil paladins will be treated just like paladins of other alignments (the DMG suggests you may want to replace radiant damage with necrotic...).

 

[hamishspence]

Drow Priest

Drow Priest actually breaks the cleric rules: no evil clerics of CE gods, only CE and unaligned.

I interpret it as being because its Priest, not cleric: the lower ranked members of the clergy of Lolth, who fulfil different roles, and do not get the snazzy powers of clerics.

 

[On Puget Sound]

There are many creatures with Radiant vulnerability, and only Angels (of all alignments) have radiant resistance. Only two high-level Eladrin have necrotic vulnerability, while almost everything vulnerable to radiant is immune or resistant to necrotic. So switching radiant to necrotic is not a power-neutral choice.

 

[The_Fan]

You can use a "light sabre" rule for radiant damage:

White = LG
Blue = G
Green = Unaligned
Red = E
Orange = CE

Or something like that

I also like "color coded for your convenience" radiant damage, though I flavor it by the god. Asmodeus has a corrupt red light like you might see in a low-budget satanic horror movie. Zehir uses a baleful pale green light as is stereotypically associated with radiation. Lolth's is a dark orange glow, like the "deadlights" from IT. Raven Queen's "light" is more in the UV spectrum, not even visible except where it reflects off other things.

 

[Gloombunny]

I also like "color coded for your convenience" radiant damage, though I flavor it by the god. Asmodeus has a corrupt red light like you might see in a low-budget satanic horror movie. Zehir uses a baleful pale green light as is stereotypically associated with radiation. Lolth's is a dark orange glow, like the "deadlights" from IT. Raven Queen's "light" is more in the UV spectrum, not even visible except where it reflects off other things.

This is my favorite approach, except for the Raven Queen I use the pale red glow of a setting sun. The UV idea is interesting, though...