Just because it's complicated, doesn't make it a good system, and just because it was used historically, doesn't mean it should be used in a game that they tried to keep the rules simple. A lot of these ppl can't even add their damage right, and at least half were complaining it was too complicated to multiply by 10 to change gold into silver. They definitely won't use your system.
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This is why the "unit of account" concept is so important. It creates a "two speed" system where quick and easy is done with the unit of account, and when it's needed by the plot the coins are looked at. Any system that is more than slightly more complicated than the "base" 1 gp = 10 sp = 100 cp is not worth it, unless you have a "simple" layer.
I've done the warhammer system where 1 gp = 20 sp = 240 cp, and that is as complex as I would ever go without having a "simple" layer on top of it.
In my game, detailing it:
Simple layer:
1 rupee (unit of account) = 2 sp.
Detailed layer:
1 mohur = 3 gp = 15 rupee
1 gp = 5 rupee = 10 sp
1 rupee = 2 silver pieces = 16 anna = 64 paise = 192 pie
1 sp = 8 anna = 32 paise = 96 pie
1 anna = 4 paise = 12 pie
1 paise = 3 pie
The Mohur is a fat gold coin, the rupee is a fat silver coin, the anna is a tiny silver coin (often debased), the Paise is a stout copper coin, with many in circulation being cash coin from far away xian, the pie is a crude lead coin used by children and beggars,
Another form of "currency" is the tea brick. A tea brick of "the third quality" (the most common) is worth 4 rupee and weights slightly over a pound.
Lastly, there are the is the silver and gold talents, an enormous mass of precious metal (26 kg!) that only the ultra wealthy deal with...