1. \ 0 / Leve Link Parties for Crafters \ 0 /
(like they do it with battlecraft leves; SP gains based on rank of synthesis)

2. beeing able to buy (mostly important, like Manuals,) stuff that Grand Companies offer, for Guild Marks from battlecraft leves, in respective DoM & DoW Guilds.

3. May be, some leves for repairing airships, restoration of cities / towns parts, building new roads (and generally big objects), ...