What to stock up on?

What I'm gonna do:

1. Take my life and put it somewhere safe.
2. Go to Ariant and hunt for Lidium until I can't go on for some reason.
3. Hunt DEX crystal ores. As most of GMS wants DEX equipment these will be worth a lot.
4. Make sure I still have some more invetory space left.
5. Train my CB at FoG/Golem MD or Slimys (Black Crystal ore) and my Gunslinger at Roids (Dark Crystal) and at the Golem MD later on.
6. Waste the rest of my time at anything that drops plate ores.
7. Keep every single Etc. I can use for crystals.

I'm not going for that much jewels/crystals/plates as I only have very few money to spend. But in the end I'll make profit.