I have practiced my piracy (essential ?? you mean to avoid indictment ?) and found it mostly OK, although at the end of the day its a save/reload scam IMHO.
I did the outrigger trick and , yes, its quite profitable (although this was the one that nearly needed the sick bag ... I mean, talk about loophole....).
Then I practiced arbitrage, it does need some practice to get it right, I'll do this when I have time.
But by this time the game was starting to lose it magic, so I read about Levons Gold Trick (and your variant) but will get round to practicing them some other time too.
Meanwhile I just started another "normal" game
The only scam I use regularly is "Hunt the Captain then reload" and "Oh bum, where's the autosave..!" and I do save before battles sometime .... all the other tricks I'll probably use just in contests.
Wow... Having fun again....