its must be only 3 weapons for only one class type you mostly use all the time.
My main was the Cast Acrotecter
NiGHTSdoog 9/9
http://psupedia.info/images/e/e8/NIGHTSdoog.jpg
Divine Tsukuyomi 9/10
http://psupedia.info/images/thumb/8/..._Tsukuyomi.jpg
Silver Cranial 10/10
http://psupedia.info/images/thumb/2/...er_Cranial.jpg
so what is you all time favorite weapon you mostly use in battle
remember it can only be 3 most useful to you :D