I've not done a lot of raids and endgame stuff on my main so planning on using this as a gateway. Got kourend as my first unlock, probably desert gonna be my second. Haven't decided ok third yet tbh
If going for mage, Kandarin would probably be the best region. That way you can get occult necklace and tormented bracelet, perfect for mage.
If you still hasn't picked a combat style and decide on ranged with the tbow, asgarnia would probably be best. That way you can get the fortified masori, and zaeyte crossbow