Originally Posted by
Evangeliste
Elune, is actually Arcane prominent, The Priesthood of Night Elves specifically are aligned with Arcane, who are the Priests we play in-game. It's also heavily Arcane and Astral themed in her Champions the Moonkin, which is the Balance spec, wielding the Scythe of Elune which is based in Arcane. Yes there are other elements present, like Nature and Light... But as said their lore is mainly Arcane as she.
Demonstrated in things like claiming Ysera. Empowering Tyrande and so on.
Just to say to you, Light force of magic isn't needed to actually use it or realistically access it to wield it. The lore to use the Light is a strong will to access it. It's why individuals like Undead or Arthas could still use it without the necessity of doing "good" and other maligned stuff with it. That willpower can come from many things like religion, beliefs, etc, but there are cases where that's not applied because, it's forced... Like some Paladins... Which brings me to my next point with...
You are very ignorant of the existing class and race combos that are already in game.
Aside that, Dark Rangers do not have to be Forsaken raced. I mean, I'd like to think, you're forgetful of the actual lore. Dark Rangers are mainly raised High/Blood Elven. NPC's for now, so Forsaken won't even be the sole focus because gameplay wise, they don't fit the lore, which is still considered for these race/class combos. They will churn something out to suit class balance.
They need to have a bigger surplus than just Nathanos to wave the Forsaken and Dark Ranger banner.
With Nathanos being elevated to his current Legion-plus status in training other Dark Rangers that because he was trained by Farstrsiders. To be a Hunter, and those that trained him were those raised as Dark Rangers. Including his lover, Sylvanas.
That said, it clearly shows that existing combinations don't cite all their power from the same sources. The best example I can give you is Paladins.
All the Paladins don't use the same source of power. Taurens differ to Humans and Dwarves, who all differ from Zandalari too who never got their Paladin-y powers like Blood Elves, who certainly differ from Dark Iron Dwarves way.
Taurens - Religion through Light of the Sun and Earthmother
Humans/Dwarves - Religion on the sense of the Holy, devout and the Light being epitome to Divinity
Draenei - Following the Naaru
Lightforged Draenei - Following the Naaru and enduring a trail to eradicate any doubt and base their being solely on conviction.
Zandalari - Servitude to the Loa of Kings, Rezan and Holy warriorship.
Blood Elves - Tortoring the shit out of a Naaru.
Dark Iron - Not really resolved, theorised simply because Muh Vanilla, open to be things like Ragnaros, willpower over something.
By that, then Blood Elves, Dark Irons and Zandalari shouldn't really be Paladins indefinitely. You can actually bend it round so only certain groups exist through one set of sources.
In the end, they will never restrict it simply on one source of power. It would destroy the entire universe worth of lore that they've delivered for 15 years now. Because ya know... A Troll is wildly different to a Draenei.