It's 5% for adding all the aion classic kinah Lesser Supplements required to add.There are additional supplements that are not lessers however, there is normal supplements and greater supplements which offer 10 percent and 15% respectively.
It is not worth it to make use of the supplementation IMO. I own five pieces of gear , and if you are using the stones over 30 seldom see the failure. I've witnessed 4 failed attempts in a row with an 80% chance of failure, however only once on one piece. It happened when going from 10 to 11 in my case, and going to 10 for me on all my pieces. have seen 2 failures on top of that poor luck streak.
In terms of your staff when you reach 25, I'd recommend purchasing the level 26 bronze coin weapon. It's blue and has an attack rate of.5 and lasts until you replace it in the 30s. It's possible to make one, but it's going to require lots of mats, time, and effort so it's not clear if you're willing to put in that amount of money. It's up to you.
Manastone socket full crit benefit people who chant most as crits increase the opportunities for knockdowns, which is extremely beneficial both in PVP and PVE. Continue critting until you hit the number of 440'ish (cannot recall exact soft cap). If you've reached full DPS and you are able to attack for the rest. If you're able to buy a Level 25 orange staff you could also use it. However, you'll miss atkspeed.
Take advantage of 30e's accessories as soon as you can. They're the most effective accessory you can get from Stat-wise for quite a long time. They can also deal with PvP damage, and are therefore worth the cost.
It's not the same as a mill per day. considering opportunity cost for simply selling it in a player store for 70k80k, instead you're in effect setting yourself up to earn 200k300k each additional account that you can bring to lvl 10, which is around a full day of work. I don't believe anyone has taken the time to think about.
The first thing I did after the euro aion classic buy kinah beginner-rush ended was build up my alts in order to be able to sell multiple times a day.