What I've got so far is two sets of rules, cobbled together from conversations, and from existing published Thread Items.
For combined bonuses from all of a character's Thread Items:
- The maximum bonus to any single
- Defense Rating
- Talent
- test type
- Movement Rate in hexes
- other characteristic
- The maximum bonus to any single Attribute value is further capped at +6 (or Thread Weaving Rank, whichever is lower).
- Reminder: No thread item can ever boost your actual Rank in Thread Weaving. No wishing for more wishes.
For individual items being crafted, some guidelines to make them be at least a little bit in step with existing/published items:
- No more than half the Ranks of an item can be used for the same bonus. No Journeyman items that give +6 to Inspire Others. For things which are only possible at higher thread Ranks, no more than half the eligible Ranks can be used for that sort of bonus.
- Maximum of one Attribute boost per item.
- Maximum of one bonus Recovery Test per item.
- If a Talent is only available to characters who are at least Warden tier, bonuses to it can only appear at Rank 7+ of items. If only at Master tier, bonuses can only appear at Rank 9+ of items. If a Talent is only available at Master tier and is only available to a single Discipline, we consider that an exclusive special capstone power, and no TI will give out Ranks of that ability.