Is this a good party?

[Peter_20]

I always have a tendency to aim for my favourite party, which looks like this:

3 Ninjas
2 Summoners

I love this party.
The Ninjas rip anything to shreds with their double attacks, while the summoners toast everything with Bahamut and whatnot, and also act as healers (Moogle) when needed.
I dunno how relatively good this party is, though; what do you think of it?