At this point the only team runes that I keep are speed and gold. Everything else gets converted into speed. I used to keep team strength, but it seems that with the idea of roles where one monster is a attacker, denier, or supporter, there is not often a need to do anything more importantly than GO FIRST.

Do you agree? If not, and especially in the case of team strength (because I can't think of any valid reason to have team life or stamina) why combination of monster needs that extra strength?

I think team life is useful on monsters like Basthet. It greatly enhances his abilities.

Every Rune has it rule except only 1 type

It all depend on your teamwar team and strategy to get 3 coins

In some wars my attacker with 2 strength is not enough to ohk enemy so i had to add extra team rune to be able to , in our war with POF - 10th round- our voltaik needed more juice so he had 1 x stamina on him +2 team stamina on the other 2 monsters to be able to wipe the enemy team

single and team life is important if you use life defense , and in some case you need life\team in attack too if you are not going 1st and want to make sure you can endure the 1st enemy attack

The only useless type of rune is single gold