Thank you. I have the two books you mentioned as well as CVCX. I cannot use CVCX because I have a custom betting strategy. Thus, I use CVData. When I do a sim on CVData for my two hand strategy, the results are per seat and not combined to account for two hands. I want to know what data do I input in the simple ROR calculator in CVdata to account for two hands. See below:

Facts: SD of 54 units per 100 hands and a win rate per 100 hands of 2.5 units when I play one hand per my playing strategy
Bankroll: 2500 units

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The simple ROR calculator only requires three points of data which are below. Would what I input into the simple ROR CVdata tool for two hands being played with the exact same bet spread and BS deviations be any one of the two examples below?

Bankroll: 2500 units
Std. Dev. per 100 hands: 54 units
Win rate per 100 hands: 2.5 units
Risk of Ruin = 1.37% - this seems very low in my opinion for two hands being played the exact same way at the same table with the facts above. Therefore, I cannot simply enter only the Std. Dev. and Win Rate for 1 hand when I am trying to evaluate two hands.
OR
Double the Std. Dev and double the win Rate due to playing two hands the exact same way. I am not playing two hands at 75% of my normal bet.

Bankroll: 2500 units
Std. Dev. per 100 hands: (54*2)=108 units
Win rate per 100 hands: (2.5 *2)=5 units
Risk of Ruin = 11.71% - this seems much more reasonable but there may be more than just doubling the SD and win rate.

I know I am really drilling down on this simple question but I appreciate all the help!