Alternatively, your team can generate its own food for Toma using two or more Minion Masters (Heroes or human players). MM #1 sacrifices herself and MM #2 uses the first's corpse to create two bone minions. Now, #2 kills himself to release his minions and allowing #1 to grow her own from the new corpse. Repeat for the remaining time. Ideally, your party should have at least two re-usable resurrect skills, so that minion-generation is not hindered by waiting for the MMs to recover their energy.