I missed a few:
- is an entertainer to capture his audience in awe
- works clean and knows how to maintain his rope, poles, points and rigs
- can keep secrets about where to buy the best gear (for little money), how to oil, how to dry, model's medical condition or relationship details etc
- thinks in 3D when he ties, suspends and transitions etc.
Oh and of course he knows about knots and frictions (and their names in different languages) and can apply them quickly and as a safely as possible.