Cons - There's the potential for no def bonus, no stat bonuses, no skill bonuses, etc. It has no additional offensive/defensive qualities, which make bryzan armour necessary after this. With this armour, pvp is difficult to say the least.

75-80
Vepress and Shades are still necessary, but pendants can be upgraded further. Imago pendants are now available, and can be used as an upgrade for lvl 60 elemental pends.
+5 or better nomos pends can still be used at this stage.

80-85
This is a very simple choice. If u have someone willing to help u lvl in river of ordeal til 85, keep/get bone armour. It'll help u survive. If u don't, bryzan is important, as the improvement in def is massive. (Unsure the person can take u to ordeal and help u lvl there, otherwise u may not be able to sell the armour.)

80+
This stage is more advanced. For accessories...
Petunias and imagos are the only pendants which should be used, with 2 exceptions.
If one has the oppurtunity to make or buy mata pends/rings/necklace, the individual must grab it. FAST. Mata (matariel, boss in evil canubula) and Jackiel accessories are the most powerful in the game. Jackiel accessories are very hard to obtain because they require the scale of the boss in monster mill (check world map in the game for monster mill on hover island). As such, mata accessories are in great demand.
Vepress and shades are important til the mage can find mata/jackiel (read above for the problem with jackiel) accessories to fill their positions.

85-99
Basically, get sacred and upgrade when needed cronous cro. Sacred armour at lvl 85, sacred storm at 90, and sacred thunder at 95. Upgrading sacred storm to thunder sacred isn't as important as upgrading vepress to mata, but the upgrades are still necessary.

100+ If u don't already have full mata, get it. If u don't already have full jackiel, get it (If the problem can be resolved, Jackiel FTW). For armour, VOODOO! It's very expensive, but ,keep in mind that u have 99 lvls to save up for it (might have to sell previous armours to get it) and there are no upgrades beyond it 'til u get reborn (unless u have a ton of $ and wanna make - colour it - dragon/wyvern/metal or something)