Camarath
Pale Master Tarrasque
Well in that case there is not much you can do to avoid the paper tiger syndrome. At non-epic levels there is really no point in playing one since, wile your AC (due to NA and Cha [IMO DR would not be a viable option]) and attacks would be ok (due +10 to attack and damage from Str bonus), you would not be able to sustain very much damage at low levels (13th level fighter con 10 hp 76; 1st level fighter [ECL 13] Half-Force Dragon con 22 hp 16). Also your breath weapon's damage will not be all that high (average 32.5 ECL 13 to 78 at ECL 20). If this template is only used with epic characters it should work fine but at ECLs of less than 20 I think you will run into some problems.
On a side note, I still don't see how you can possibly justify the Half-Rust Dragon's LA.
On a side note, I still don't see how you can possibly justify the Half-Rust Dragon's LA.