Originally Posted by
Zephyrion
if you're BR/PH you need the DEX mag because both Braver and Phantom mag stack to give you twice the base S-ATK. If you play any other subclass, S-ATK mag is fine.
Not sure what you mean about tech disks but Braver Phantom pretty much only uses support techs for self-sustain and utility, so resta,anti, megiverse,shifta, zondeel, zanverse, deband. Some offensive techs might see situational use for inflicitng status effects on boss and the likes but they are not fully essential to play the class combo, so you can just slowly get the other disks as you play the class