https://wiki.project1999.com/Imbued_Platinum_Fire_Ring
You can wear these rings sometime around late Kunark/Velious if you worship Solusek Ro. Are they very nice rings? Yes. Will they make a meaningful difference if you're still playing your Wiz by that time? Not really. Because by that time you will already likely have rings like:
https://wiki.project1999.com/Solidate_Mithril_Ring
and
https://wiki.project1999.com/Band_of_Eternal_Flame
I have a pair of the Imbued rings on my Wiz on Blue and never wear them because the extra mana isn't worth the negative STR 99% of the time. They're really nice twink gear when paired with a
TBB, but that's about it. But they are an option you don't get otherwise. Solusek Ro faction is also basically identical to being agnostic, but you start amiable instead of indifferent to the Temple of Solusek Ro for quests.
So while Sol Ro is technically the min/max deity choice, at this point in the timeline it's not a big deal because you'll be waiting so long for those rings anyway.
As for hunting, stay in Nek until 7, then head to WC.