I do remember there was a quickcast option in the old game that would let you cast all buffs in a single turn. I found this to be a bit overpowered so I'm not sure if it should be added back into DX. If it is added, maybe it should just be a convenience feature that casts each of the spells sequentially, but still consuming food, water and making you susceptible to ambush during the casting.
Alternatively, the quickcast list could be associated with a trait, and you can only multi-cast your buffs if you have that trait. This would be a good way to balance the feature.
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