Breach is a must have for party Mage/Sorcerers... unless you really hate your tanks or something.
Breach however... is useless for solo Mage/Sorcerers, ironically... ...
Breach mostly removes spell protections that protect the enemy caster from weaponary. It does not usually remove spell protections that protect the enemy caster from magic.
When was the last time that you saw a Breach remove a Spell Trap/Deflection/Turning?
Also... I do not really like Secret Word... the very fact that Globe of Invulnerability nulifies it makes it one of the most useless counter spells when it comes to long term usage. You will end up using a higher level counter spell anyway... ...