First of all, can you afford +20 scrolls?
I created template to which you need to change you character the least. Skip those necromage promotions etc. Im sure this is The template for oldschool inscription mage
Depending on you bankroll:
110-120 magery
110-120 eval
115-120 wrestling (If there's a way to afford 1x +20 scrolls, use it on wrestling! Otherwise those archers are real pain in the ass)
110-120 resisting spells
80-120 meditation (Depending on your suits manaregen)
100 scribe
60 chivarly (If you have free skillpoints for it)
Then you need to start collecting armor for your mage.
What mage suit needs:
Mana regen (more the better, max cap is 12)
Lower mana cost (more the better)
Defence chance increase (more the better, max cap is 45)
Faster casting 2
Faster cast recovery 5-6
Spell damage increase would be nice too
High resist! (All resists 70 if you can make such suit)
Lower reagent cost 100 % (You dont _need_ this, but it's really great to have)
I know creating a suit with all these properties can be pain in the ass, and I think you shouldnt try to get all at once.
Create a suit with High resists, some mana regen, some lower mana cost, and if you can get some defence chance increase it would be nice. Then start to PvP. And then start changing piece by piece you suit to better one
Faster casting 2 and Faster cast recovery 5 or 6 is a MUST.
If you think "Why I need chivarly?" Answer is, Remove curse will rock your world when archers/necros attack you. Remove curse removes Mortal (If you have mortal on, you can not be healed), and it also removes strangle.
For wrestling mage Scrapper's Compedium book is great, get it! (
http://www.uostuff.com/index.php?title=Scrapper%27s_Compendium )
As you can see, it gives FC 1, FCR 1, SDI 25% (which is more then PvP cap, so it maxes your spell damage) and lower manacost 10%
And most importantly, get friends who knows todays PvP, and play with them. I came back too as pre AoS player and this all was so messed up that I almost quit UO. But I found people to help me to get on my feet again and they teached me how to PvP nowdays, and it's damn fun now! And remember, because of insurance, once you get you suit done, you will always have it
And most importantly, Welcome Back!