You want a raid tier? Because that is how you don't get a raid tier.This post has all of my concerns with OPs concept. Between the endless complaints of the "entitled" and the idea that using the points as a unlock method rather than a currency, it's like they read my mind.
Personally, I feel it should be done not as something bought, but rather unlocked appearances based on total account score. For example, at 1000 points, a full set of each armor type and weapon type would be unlocked. Next set, plus some enchant appearances perhaps, would unlock at the next milestone (maybe 2500). There could even be unlockable visual effects that could be applied to gear slots other than weapons: maybe a glow effect for the head. Obviously, the higher the point value, the more impressive and visually unique the cosmetic unlocks should be.