Reward players for helping with quests they don't have

Hey guys,

when you invite friends to the game and you want to quest together I find it unfortunate that there is no reward if you are not by chance on the same quest. Like Andy P posted:

Ofc you can level with Skirmish and Crete TD but then again you need the questlines to unlock the legendary quests.

So perhaps we could add a reward for helping others to complete their quests.

One way to implement this would be to add a repeatable quest that says "Help five players to complete a quest" or something along those lines and it would reward you with some chests and coins.