For the tournament, I would choose the following templates: 3, 4, 6, and 8 (in the order they appear in the editor and on my list). There will still be time before the tournament starts to decide how many and which templates we will use :)
By the way, it's better not to use computer-controlled opponents in the tournament; they are already incredibly overpowered on "Veteran" difficulty - with infinite resources and very rapid development, they have access to all troop levels by the 2nd week. They can really cause problems...
I was playing as Necropolis, and a computer-controlled opponent appeared on day 131. If 13 gnome priests hadn't joined him, I would have crushed him :) But because of them, he had 130 Grims, 10 Altars, 70 Gargoyles, and 20 Golems. Against my 2 Wraiths, 6 Liches, 3 Archliches, 15 Vampire Lords, 30 Zombies, and 100 Skeleton Archers. The troop numbers are approximate.
I wouldn't say they are overpowered, but they can definitely be a nuisance.
Наше оружие - неожиданность! Неожиданность и страх, страх и неожиданность - это два наших оружия! Плюс безжалостность - три наших оружия: страх, неожиданность и безжалостность! И ещё фанатичная преданность Папе - четвёртое! Наше оружие включает в себя... наше оружие включает в себя... страх, неожиданность... я сейчас!