How do people beat some of the stronger opponents?! I have: Blue Sai Item Hunters Shield Item Hunters Staff Red Rreign Staff of Lore Shinwas Bow Silver Sai Sparkling Pink Sai Ultra Sword and mainly I just only use Shinwas Bow and the Red Rreign Staff =/ but I loose pretty easily to the higher level battles

You need to also train your pets more. As for your weapons I suggest taking a peak at this thread here. Its really up to you how much you want to spend on everything but first and foremost train more often, it pays off.

Also keep these ones for sure though. Red Rreign Staff of Lore Shinwas Bow

Fireside Bow is a nice upgrade from the Shinwas bow and usually isn't too expensive.

thank you!