Yep, that is not even in the same neighborhood as 'balanced.' I thought the saving throws were bad (if I'm reading this right, they end up with an effective +9 to both Fort and Will saves in five levels) but the Magic Mirror abilities are way over the top, I'm afraid. Level 10 character completely immune to magic - not even 'infinite SR immune', which can be bypassed and would still be unbalanced - but absolute immunity plus spell turning. No other class gets that in 20 levels, let alone 5; it's an upper-tier Epic ability. I understand the desire to stick close to the source material, but this is one of those situations where the source material just doesn't work in a game.