best rating interval setting?

on my first accounts on this site i would set it to +200, -50....

i thought this would guarantee improvement cuz then i wouldn't face really weak players---however this led to a large amount of losses compared to wins which I thought was disheartening because its easy to lose more games when on a losing streak (which is more likely to happen with +200, -50) and nobody likes to have an account with more losses then wins amirite?

I posted a topic about this and people pointed out that if I didn't give the opportunity to play against people rated 100 lower than me, why should I receive the same treatment?

So I  started a new account (this one) with just the regular +200 -200.... however I feel like i am facing more weak players than stronger ones (avg opp is 1257).... Should I perhaps tweak this to +200, -150 or -100?

Sure, why not