Quality of a host isnt determined by how many games they played or hosted.
Quality is if they have a gist for it.
If you have a thing for hosting it comes natural to you. Doesnt matter if you have 2 - 4 - 6 - 8 abilities. If you understand the concept and you have a balanced system it is impossible to screw up in a big way
Most screw ups stem from balancing issues and low concetration. When some abilities mingle in a way and you cant determine which is right, or if you go full on mechanics. Same if you do night actions - how we say it - like you dont give a fuck - you screw up
I dont know how good of a host or player TAC is but if he thinks he can handle bigger stuff he should do so. Hell my first game was 20 players with heavy mechanics - Borderlands game -
As long as you have
- Balanced game
- Clear mind
- Organized Google sheets
You will do just fine