I'm working on getting my 3 FICO credit scores above 800.

Currently my 3 REAL FICO scores are:
Experian 765
Equifax 782
Transunion 775

My total credit card debit is only $250.00 with my available credit card limit being 115k over 6 different credit cards including VISA, M/C, AMEX, and DISC. Would me using say... 20% to 25% of my card limits over the next few months so it reports to the 3 bureaus then paying them off again back to zero balances within 3 months or so later help me get closer or possibly above 800 scores?

Thank you in advance for any input and suggestions.