About Wiz, you need PHEN accesory like "Clip under a cast" or Equipment that can make you uninteruptable while casting likes "Orlean's Gown".
If you have no, you need skill "Safety Wall" (should be max). This skill can use to prevent be hit at the early level.
My suggest build is INT/DEX/VIT or INT/VIT/DEX, second build need PHEN accesory to standstill and receive some pain while casting. Btw, you cannot cast fast enough with cheap gears, even if you have invest much DEX in it.
Optimize skill build is FIRE build. A lot of monster those are Earth and Undead Attribute are a lot at early level.
You have 2 options to max out either FIREBALL or FIREWALL. You cannot max both because you need some prerquisite skill for Wiz skills. (Strom Gust and Frost Nova is needed madly.)
-- Snake and Spore at Payon map is the place for everyone. Hunt until level 20 or more.
-- FIRE Ball is da best to kill "Ant Eggs" at Ant Dungeon while you are level 20-40. Fireball is best AoE while being Mage.
-- If you go FIRE build, "Groove" is the BEST monster leveling about lv35-50.
-- "Golem" is magic detect monster but it is slow, you can cast fire wall or even cast and run. They can be hunted at level 40-70.
-- Level 70 and more go GRAMP TI.
Next build is WATER/LIGHTNING build. Choose either Lightning Strom OR Frost Nova. Frost Nova can froz
en monster and become Water attribute and finish it with Lightning Bolt.
-- Spore is water attribute, go with Lightning Bolt.
-- Byalan Dungeon, FTW. (go from Izlude) Byalan level1-2, till level 20-50 and hunt Hydra for early level but beware your step.
-- Ant Eggs with Lightning Strom is win, too.
-- Metaller at Golem map while level30-60
-- Greatest General is Fire Attribute. It is immobile and Melee. Very sweet with Cold bolt while level 40-70. They are at Payon Forest.
-- Level 70+ -> TI
You have not to max out your bolt skill. It is easier to play if you max it out but about 4-7 bolts are enough to kill almost monsters at your current level if you are high INT. Sage need to max out the Bolt skill but Wiz not.
Sorry, they are no weapon better than Eden for Wiz if you can't afford PHEN. The non-high-end weapon need to be +7 or +8 to be better than Eden's.