Here is a link of a Wizard Guide & i dont want to plagiarize someone else's. =)
http://www.gamefaqs.com/computer/doswin/file/944702/52442
It has pretty good guide from lvl 1-100, skill grinding, pvp, pve & equipment.
Wizard lvling guide after you are lvl 100(also for every classes):
lvl 100 - 120: RS, UG, LS, EoD & Fgr Cabal Alz
lvl 120-125: same as the top 1 but no more rs cuz u are too high for it.
lvl 125 +: SoD, B2F, 4gotten temple & MF
Every classes has same skill rank bonus(yay! 810 free hp):
Want to Calculate your character status ---------> http://www.orazur.free.fr/
Wizard Upgrade Skills(6 slots):
Vitality Mastery (hp)
Reflex (def rate) or Defensive Sense (def)
Force Control (mag)
Damage Absorb
Sixth Sense
Ruling Force
The Min stat for level 170: 28 str 260int 59 dex
Heavy Armor Wizard:
more str for more hp and def
http://www.youtube.com/watch?v=SXGCO2nVaW4
Equipment shall be mostly magic amp or dmg wont be so that high.
Pro: Higher Hp. Higher Def. Magic amp Armor Is cheap Cabal Alz. and its fun to Surprise ppl in a duel ^^
Con: i think your chances of missing are a lil higher due to the lower Dex. and your Def Rate is lower.
If u are heavy wizard, u shall have these upgrade skills
Vitality Mastery lvl10
Damage Absorb lvl3
Ruling Force lvl3
Eyes Of Mind lvl3
Sixth Sense lvl3
Fore Control lvl8