Why wouldn't you be able to make tier 1+ potions? You just need material composition to get the items you need for higher level potion/scroll making. The higher level scrolls can be bought by fame I believe via the item shop in Elderine. It'd be kind of stupid if Outspark made you "buy" production skill scrolls though?

I doubt anyone would buy it anyway, imo.

Alchemy,
the using of alchemy stones to convert items such as spirit dust into different tiers of the item. It helps alot with producing if you need to make a certain scroll or stone and all your craft items are too high for it.

Skill Need for Lv Potion and Scroll.
The other put in other chars =)

I think you mean Material Composition and Material Decomposition, all of the skills are alchemy.

Ohh and what does Material Composition and Material Decomposition do?(Sorry for the silly question)

Material Composition takes a certain quantity of a lower tier substance to create a higher level material.

Material Decomposition takes a higher quality substance and degrades it into more lower level materials.

I personally would suggest your main account be a Potion/Scroll Maker, and two secondary accounts with one with the skills of Material Composition and Decomposition and the other with the skill of Stone Production and one repeat skill of your choice.