I found some new info on the vis economy. Our prior assumptions are flawed and our trades need re-thinking. Also, it is extremely unlikely we will be able to maintain a lvl 50 AotH for more than 1 year. The general prices for trades are made acording to the Universal Vim Index which is the amount of vis you need to trade to get a rook of Vim vis. Intellego's index is 7 therefore you need to trade 7 Intellego vis for 10 vim vis. In the new system, Vim vis is way, way more expensive. This is explained in: http://www.durenmar.de/articles/viseconomy.html . In general, vis is a much more precious comodity than we had previously estimated.

Universal Vis Index (UMI) ordered by most valuable

In : 7
Vi : 10
Co : 12
Cr : 12
Re : 14
Pe : 14
Mu : 15
Im : 19
Ig : 20
Me : 20
Au : 21
An : 28
Te : 29
Aq : 31
He : 38

Informal Vis Trade Rates based on the UMI

1. Intellego (2:3 or 3:4)
2. Creo, Corpus and Vim (1:1 or 5:4)
3. Muto, Perdo and Rego (3:2)
4. Auram, Ingem, Imaginem and Mentem (2:1)
5. Animal, Aquam and Terram (3:1)
6. Herbam (7:2 or 4:1)