I'll give you the TLR version.

Crafted ilvl 170 is best in slot provided... you HQ it and pentameld it to its stats caps which is really expensive since you'll have to use rank 4 and maybe a 5 materia to beat its counterpart ilvl 180 gear. For a crafter with not alot of money full left side ilvl 180 redscript is a perfect option. It cuts down on the expensive melds your going to have to do and its going to give you stats that are STILL overkill once you get it all.

For you its going to be super expensive EVEN IF you can craft it so I strongly for you at least don't recommend the crafted ilvl 170 set unless you hate your money.