You can buy materials... And then sell em for gold... And easiest list of seals to attain?

Personally, I feel that would just be a waste of seals at this moment in time. I'd think those training seals and puppet minis would be higher on people's list of things to get than materials. The materials aren't worth much in Tarlach server anyway. It's like 45k for a stack of finest leathers and like 90k per stack of finest silks and fabrics. Maybe if you're making some high level item, you'd buy the materials with seals, but there's not much point in making clothes and armors these days besides just ranking up, and training seals do the job better.