Okay made my first set the other day thought i'd share my learnings and key takeaways, im sure this wont get shared by everyone on the site.
This is an example of if you want to build a 6 piece 100% Lower Reageant Cost, 6 Mana Regeneration & Full Resist suit
I first looked at all the options and %'s so it seemed the following order was the best route
1st Imbue = LRC 5 X 17% & 1X15% (Head) I did dull copper circlet
2nd Imbue = 6x MR
I dont have a mathmatical brain like some people so created a simple SS, please find copy here
Dropbox - Imbuing
3rd Imbue = I added them all to a spreadsheet, I want to keep the maximum imbues to 4 as a worst case, to ensure i generate maximum profit so i first look at the lowest resist on each and imbue to the maximum before the rare mat is required, for resists this is around 15-19% depending on the item. Then on tab 2 of my spreadsheet i add the amount of mats required this then generates your cost. I like to keep a track of my costs right down to the cost of a single use of a sewing kit. If it helps i also change the font clolour of that Imbue so its easier to manage IE 3rd Imbue Orange, 4th Green, helps me scope out gaps.
4th Imbue = Fill gaps, don't over do it and your learn some items imbue certain resists better im still learning that, also dont over imbue if you dont need to it will cost money and if a 5th Imbue is required will reduce the sucess chance
5th Imbue = Worst case secenario if you havent filled all gaps, this will have a lower % of sucess so only use if you need too
I always track costs of fails , leather, ignots & tool usage (1gp per Hammer/Sewing Kit used.)
I made 6 this week, all coming in at about 47-52k cost if i brought eveything , Average 2 fails per suit.
Side note, you need to be a minimuim GM Arms Lore, GM Tailor (Leg Preferred) & GM Imbuing (Leg Preffered)
All prices are based on NPC Vendors for Jewels (Europa) & Player Vendors for imbue mat's & leather/ignots
Hope this helps.