Wizard is simple and you should probably buy one they are cheap.
Stats: Go full psy
Rings: Buy/earn from instance dungeon earth twin set and metal twin set (you can use the search function to learn how to get them and how they work)
Weap/Armour: u just use glacial staff with psy, absorb and your choice of DD or Armour def. Pure PVE ppls like Armour Def but if you are mixed then go for DD. PVE you can get like crit drop for armour for mixed you should just get HP.
Defender/Guardian: If you can find a char around the same lvl as the wizz then buy it if not you both start from 1 I guess.
Rings: Start by getting fire and earth twins and at the endgame you will need to make some reinforced boss drops or insurgents (I wont confuse you with the details now)
Weap/Armour: If str go % melee and dd% if vit go %hp and dd%. Armour is always max hp and you can just have the same armour as your friend.
Templar: They are cheap as hell you can just buy a 115 because everyone made one in the last "boost event"
Rings: Wood and Earth twins will work if you are lvling but you need all stat rings (bare minimum is 4 insurgent's chain +8) there are better rings and higher reinforcements that you can get.
Weap/Armour: Glacial weapons suck for templars you either get an epic/upg (super super expensive) or you get a tali/opaniel club (+8 is the minimum again). The tali/opaniel weapons need spirit stones (they give your weapons the options that you get from forging). Overall templars are really expensive if you dont have an epic/upg and I would not advise you to go this route.