Board Thread:Card Unit Builds/@comment-24596086-20151007184539/@comment-7620285-20151008194430

you want to know how to prioritize Unit Cost vs Magic School vs Castle? i think it depends on what your goals are in the game

I think the unit cost upgrades are the most valuable since your team's skill composition basically determines how successful you can be in battles. since you do have the cards for an optimal deck, i would suggest doing this.

However if you focus on ranking, Magic School is the most important. if you can't afford to make your optimal team, you can still send your AW/FAW away for comrades to kill, and finding AW and having a little more BP is crucial for ranking. but even for casual players, Magic School is nice because it's far more interesting to play the game with easy AW encounters instead of wasting 4-5 steps per AW.

I think Castle can be last in all cases, though. Yes it's nice to be able to build the 2nd Elemental Shrines for an extra boost in ATK/DEF, but as I mentioned before, the team's skills are FAR more important than a 10% bump in stats.