Well Ive Been Reading these forums for a few weeks now and have gotten alot of useful info so i am going to share a lil with you guys. I read the topic about upgrading with very lil dbs and the one trick that was mentioned is a rumor (in my opinion).
Anyway i use a really simple trick and i have about an 85pc success rate ( meaning i have failed a few times but it seems very consistent). I have used this trick on very high lvl items which i seem to have a rare success rate with.
First thing take the item you want to upgrade and go to market and talk to the artisan to see how many dbs it will take you in market. Now take your item and dbs to tc place the item in and your db. Now double click the db so it leaves the artisan window and is back in your inventory. You do this for as many DBs as it would cost you in market .i.e for 3 dbs for a ref club to become uni you put the db in three times then click the upgrade tab.
Now alot of you will probably say this is luck, but i have upgraded soooo much stuff with 1-2 dbs usually from elite to super using this trick and i feel pretty consistent with it now. By all means please feel free to try and post your results and if it doesnt work for you my condolensces