[Tirrock]

Rajas' STR/DEX gets increased every 15 levels, so there are levels where there's better stuff for STR or DEX.
30 = Rajas: 2 STR, 2 DEX, +5 subtle blow, +5 store TP
36 = +3 STR or +3 DEX rings available
45 = Rajas: 3 STR, 3 DEX, +5 subtle blow, +5 store TP
54 = +4 STR or +4 DEX rings available
60 = Rajas: 4 STR, 4 DEX, +5 subtle blow, +5 store TP
72 = +5 STR or +5 DEX rings available
74 = +5(6) STR or +5(6) DEX rings avialable (do those elemental rings even have a HQ?)
75 = Rajas: 5 STR, 5 DEX, +5 subtle blow, +5 store TP

I personally got rajas because store TP is a very unique trait for non SAMs, even though my main is SMN. I use rajas because I feel it helps my overall damage better than +5 attack could in it's place.