Are they heros or artists?
Hi,
I think it is ok heros can't be used on attacks and defences during upgrades (just like the other units) however, i believe they also should be avaiable during clans wars during upgrades (just like other units).
I know it is a major problem for all users. For me, I can easily say I always delay my hero upgrades just because of clan wars. Because I know if my hero is sleeping, there is no chance for me to get 3 stars on th10...
By the way, they are called heros but when you actually need them, they are not there! What kind of a hero sleeps on a clan war?
Sincerely,
A user