I have leopard tortoises and I feed them the mazuri once a week and greens the rest, mostly grasses.
Mazuri was originally designed for Galopagos tortoises if I am not mistaken. I believe they have a higher protien requirement probably because of their huge size. I have read that most tortoises dont need much protien so I give it to them sparingly. I have also read too much protien can be hard on their kidney's. My thought is better safe than sorry. I hear they grow faster on straight Mazuri but I am in no hurry to raise my torts and possibly damage their kidney's in the process.