try this

0-15 = newbie (remember to follow the quests and took the pet)
15 - 25 = Mage piya on outer lanes of lime . (you can one shot it if you had 2nd skill on impact)
26 - 45 = midstream of mimir
46 - 60 = meowgician
60 - 80 = solar
81 - 120 = crack crab
121 - 150 =
choose between this depending on your capability
CG(cross only) / IC(impact or cross) / Catacombs(cross only) / Esdel (impact only)

now you are going to change your job. knight is very recomended to change job at 150 immediately due to massive needed of knight for being tanker

now if you are defender
151 - 200 = IC (bring some decent apostle. they will be so happy coz you are a massive farmer now)
201 - 230 = DOD , you can solo now. YAY !!!! >.<
231 - 251 = esdelorn / maybe blue eye?

now if you are renegade
151 - 171 = red soil (nay, much ppl dislikes renegade due to a massive nerf for it )
172 - 190 = sikara (never touch polibus unless you are going to fight one by one against tipareth alone)
191 - 225 = DOD
226 - 251 = go you can go to blue eye now or you can choose alca


how to get decent armor of knight?
you wont need a lot of decent armor. just decent weapon on 1 - 80 since you can kept one shot them using impacts
but after that, get yourself daylight armor and + it to 7 ( 9 recomended) . use it till 16x and then use your respective 2nd job of 16x armor/weap