[Mzyxptlk]

3 is not a magic number for RPS. RPS revolves around winning against 1 opponent, tieing against another, and losing to a third. But that split of 1/1/1 is not fixed in stone (or in rock, if you'll forgive the pun), and indeed, if you want to have more offensive stats, a W/T/L of 2/1/1 (4 races), 3/0/2 (5 races) or 3/1/2 (6 races) will work better.

However, it is worth noting that RPS is incredibly crude. My r50 stats were very RPS-like, which made them simple but boring. RPS makes fleet compositions much less important. If Xan can roid Ter whatever Ter makes, then you no longer need to even look at unit scans to be able to attack. Just launch at the fattest Ter you can find.

Personally, I've come to prefer a setup in which each race has at least 2 radically different fleet compositions, and preferably 3. My choice of race should not be the sole factor in deciding against which fleets I'm strong and against which I'm weak. In such a setup, overly RPS-like stats are actually detrimental. If Ter can build 1 ship to stop all incs from FI fleets, then I always need to have that ship, and will therefore have fewer valid choices.