Here's the perfect example from Castle Clash (Android):
That's what I've been complaining about... how are you to know that upgrading is BAD in this game? It's entirely possible to screw yourself on the first day of play with no way to recover.
The only things you should upgrade are gold and mana storage and the town hall so you can get all your bases.
Edited by Cordi2L33t4u at 11-1-2013 04:59 PM
upgrading isn't bad in this game, the person shown in the pictures either spent hundreds (if not thousands) to get the heroes he has with their talents or more then likely hacked his way to get them to #1 as the honor points needed is likely to be impossible in the time it took.
edit: upgrading isn't bad, but it's all about moderation. the main thing to concentrate on is getting griffins to level 5.