Making your SC is much easier as you may think.
Follow those steps and you do well:
1. Decide which Epic dungeon Items and/or other feather items you want to have in your SC. Nothing is really mandatory, but at least the TG chest is recommended, depends on your character, TG weapons too. (If its too hard to decide for a first time self made SC, pick the TG chest, craft the rest)
2. Use Zenkcraft (in the crafting section of this fotum) to build your SC.
3. Go to the market explorer or your vault and pick the best character specific jewelery you have, and add it to Zenkcraft. How this is done is explained in the short video tutorial... super easy.
(Why start with jewelery? Because they are randomly generated and nobody has exactly the same sc as soneone else).
4. Use 99% or 100% quality crafted pieces in the tool and see if you can max out everything . If not, replace the rog jewelery for better ones (and more expensive). Then repeat step 4. Till you have everything on max.
5. In the tool, create a report. Thats what you send to the SCer in game to craft the gems.
6. Dont forget to contact your alchemist for procs.
7. The temp for an SB, if you want the best weapons included in the SC, is very expensive. That can be 30 plat or more if you dont have good rogs and need to buy them
i know... trust me.
8. Enjoy.
Kind regards.