As a poor sword player I have bought Razor in first place. Playing in party there is no big difference between spiritthorn helmet and cobra hood/falcon coif when you have good healing from your friends. Razor improves your playstyle in many ways and you can earn better money with that. As 700 ek you can hit spots like wz3, upper roshamuul south, mitmah sanctuary - all with decent gear, and out there you can earn between 1-1,8kk per hour together with nice exp. Coming back to my first sentence, the choice which I made personally - buying Razor first - improved my bank account because it opened more spots for me to hunt and make better money, after that I have bought helmet quite fast.