I should mention, a mag should usually only need attack stats of your class. A hunter and ranger mag should only need attack and accuracy, and a force mag should only need mind. It may be worth looking at your class's caps in order to see what you want their stats to be.

If you can manage to get a lv100 evolution, that should speed up feeding by a large amount. Look into it, but don't go out of your way to get it. Defense is a useless stat to have on a mag, and mind is useless for non-spell casters, so having to have them match your accuracy and power will ruin the mag. If you can make it so the requirements are accuracy=power, then maybe go for it. Note that you can make a character of another section ID and give it the mag for the last feeding, if you want a specific mag (for a specific ability, for a specific look, or because it's easier get).

Most photon blasts are pretty useless. The damage just isn't worth it, especially solo. The shifta+deband one is useful for android characters when soloing though, and their trigger commands (heal when hit, revive when killed, etc) are worth getting.