Yo!
As a system/discretion trader...
1st thing to consider is your trading style. How much of your style, which I assume from past interactions is discretionary... are you willing to sacrfice? This becomes a large part of what you are going to do.
"Risk of Ruin", "Utility Thoery" and other Equity based analysis is in a way a limitation based on how you trade. You have a certain track performance... then you allocated XXX amount of risk per trade so that you don't go bust(Risk of Ruin), or you lessen your risk amount based on DD (Utility Theory) and etc. etc....
Honestly, there are some systems that work well without any well known equity analysis and there are some that do.
Also, considering you're a discretionary trader, there are some boundaries, too. Traders(generally, speaking of discretionary) have different ways of getting their mojo going... some perform well under pressure of getting out of DD... like a comeback kinda style. Some might be constantly consistant.... Depending on how you trade the techniques that you should implements changes.
Being both, I'll be more than glad to help...
Personally, you are one of the rare friends I met in ET and I wish you all the luck.
Also, you should talk to nitro, he's in vacation but most likely he can give the most insights, though he is not completely intuitive like you.