As it stands, brute focing a dragon with more people can be detrimental but overall it's always beneficial.

I like the idea of having puzzles based on 3 people interacting with the environment as a team, and it being detrimental to have too many. This might then lead to some elitism amongst heroes but I think it'd be minimal considering the amount of eyes that'll be turned towards anyone heading into the tower.

There were many aspects of the Silent tower I liked, and one of those was figuring out puzzles and trading the information with others to figure out more. I was very sad with the last big outting of it - it made me realise how small my precious secrets list was amongst other things - and that there were so few people out there with the knowledge to train and run a group through it that I'd likely never see some of the sweeter gear others had. If there was a way to enjoy that aspect the same way you can with dragon lairs (learning that there's ways to go about them, and ways not to) then that'd be a pretty neat middle ground.

Also, keep the treasure room the way it is. I still laugh every time I pk someone in there and steal what they grabbed