"I Bet $25.00 at 0 and negative counts,however I do not stay in a game with a TC count of more than -2."
$50.00 at +1 TC
$100.00 at +2 TC
$200.00 at +3 TC
$250.00 at +4 TC
$300.00 at +5 TC and higher
Using the I18, I make your hourly win rate $46.25. SCORE is $24.21. The average bet is $54, making the e.v. 0.94%. Your ROR, of course, depends on the size of your bankroll, which you didn't mention. A $25,000 bank gives slightly over 7% ROR, for example.
"Is there a better betting ramp to be using in this game?"
Yes, of course. You could win 25% more by betting $200 at +2 and the top bet of $300 at +4 and higher. But, you'd have to jump your bets somewhat to get from $25 to $200, with just +1 in between. And, again, you don't mention bank, so I can't furnish ROR.