Fortunately, for me, my main asset is speed. Plain and simple.
If you look after yourself, keep yourself healthy and have good sparring, there shouldn't be any issues regarding ring rust.
I threw about 16 punches in 3 seconds. It was some Bruce Lee speed!
He could've had Jesus, Buddha, he could have had every God in his corner, it wouldn't have helped him against me.
To move up to heavyweight to fight me is a jump too far, in my opinion.
In between training sessions, I'll often watch DVDs of King Kong, Godzilla or Frankenstein, just to keep my mind on the task in hand and remind myself of the magnitude of the challenge.