Here is what you need to buy:
Need to update this picture: changed helm and using 1 rol+2 instead of a cr+2.
*Troll mode off* xD
I think the best options is to follow Killerkarl's advice. Buy those stuffs then farm alz bit by bit (can take years unless you got euros and resell vouchers

), to improve your parts to shineguards and mithrils.
But remember the BASIC RULEs:
1.Dont care about DEF focus on DAMAGE first. (amp/crit dmg/ crit rate/ attack)
2. Your armours (gloves/suit/boot) MUST have 7amp minimum, never go below.
3. Your GS it the most important part of a Warrior set, choose it wisely.
4. Warrior doesnt need a lot of def, it need a lot of crit dmg.
Best Regards
Nuisa