This last weekend I hooked into what seemed to be a very good sized Yellow. It took off and went into the kelp. After about 10 mins I got broken off at the knot where my spectra and mono meet

. I had 60 feet of 30lb mono as a top shot and 30lb spectra underneath. Needles to say that after the adrenalin was gone the frustration and dismay kicked in.
Here is my questions:
1. My spectra is about 2 years old. Do I need to replace it?
2. Do I need a shorter top shot?
3. Do I need to use heavier everything and if so, how heavy?
All advice is welcome, thanks.