EZ Server

Just a little information for those doing these for RoA or Crafter's guild.  These are the success rates for a 250 trivial combine at various skill levels using the calculator at EQ Traders, with and without mastery 3 in the relevant skill.  These may be useful in helping you decide how much effort you want to put into skilling up in various tradeskills.

Skill 50 - with mastery 3: 7% -- without mastery : 5%
Skill 100 - with mastery 3: 32% -- without mastery - 5%
Skill 150 - with mastery 3: 57% -- without mastery - 14%
Skill 175 - with mastery 3: 69.5% -- without mastery - 39%
Skill 200 - with mastery 3: 82% -- without mastery - 64%
Skill 225 - with mastery 3: 94.5% -- without mastery 89%

At skill 250, you are essentially at 95% success rate with or without mastery.  Presumably anyone doing these would have mastery 3 in all the tradeskills.  The reason I list the percentages without mastery is that for Jewelcrafting, only enchanters have the mastery AA available. 

I actually found that out the hard way yesterday; with all AA's maxed and JC at 175, I just assumed I had the mastery aa's and burned a couple seals (thinking I was unlucky the first time) before I actually went and looked.

The mastery may be implemented a bit differently in the emulator than on live.  It basically gives you an additional 10/25/50% chance to succeed at a combine, regardless of skill level.

The skill formula for items that trivial over 68 is:

chance = (user_skill - (0.75*spec->trivial)) + 51.5;

The minimum chance is 5% and the max is 95% for something where your skill is under the trivial point for the item.  If it is equal or over it's an automatic 95% chance + 1% for every 40 points over you are.

It's well worth it to invest in the mastery AA skills before you attempt this even if you're going to skill up everything to 250 before trying to make the grandmaster item.

I also overlooked that I did not have JC mastery.  It would have been much cheaper to skill up JC than to burn as many seals as I did.