For lower levels (10-19) the ingredient split at level 10 can be got around by scribing other crafts lvl 10 recipes - Sure you need to bribe someone to go into their craft specific tradeskill to buy the scroll for you, but it is worth it. Only the primary ingredient needs to be pristine for making pristine stuff, so it doesn't matter that you don't have the extra durability buffs for making the intermediate stuff to pristine.
Unfortunately there are some greedy idiots buy the level 10 scrolls ( for 4 and a bit silver if i remember right ), and try to flog them for 15s +, which is a bit rich for 1 minutes work.
- I try to have a couple for sale at about 5s to undercut these profiteers when doing a sell session.