The Obvious Choice

Skullius, of course, chose to unorthodoxly augment the calibre of his Andori through the shard of Broader Existence from the Doom Knight.

It might have made more sense to create a separate reserve of Amras, but Skullius deemed that unnecessary for the moment. Even if he managed to double his current reserves of Amras, it wouldn't help him much if he didn't have higher attack power for future battles. Besides that, he had just gotten a massive stock of Exora Mead. Granted, it didn't resolve the problem of Amras perfectly, but Skullius would be able to replenish it, however slowly.