Tip the Scales:
Very situational, the high cast cost just for a plus flip is not worth it in my opinion. If you have a high card like that in your hand why not cheat it in? Unless you're trying to get through cover it doesn't seem worth it.
Giving a negative will help decrease an opponent's chance to hit which is a good idea. But it still seems rather dangerous.
Balance the Scales:
To be honest, this is the only reason I take Scales of Justice, being able to recoup the loss of resources is great. Not much can be said otherwise. Another card in your hand helps with casting, discarding for healing flips, discarding for decapitation, and cheating fate.
Made an Example:
Great when your opponent is throwing out WP duels, but otherwise very situational. There aren't that many abilities that I've found that work well with it, but I want to experiment a bit more. For instance the Death Marshals' Pine Box works well with this, and maybe the Judge's Stand for Judgement.
I find it hard to remember the effect this guy has while playing.