When it comes to the Elephant boss, and likely other bosses in general, they should move faster. If you make your "base" in the center, it takes the Elephant like 6 turns to reach you. Just wasted time. And its not as if anything else is happening. You're just... Waiting for it to reach you. Since no other mobs spawn during that time, it could just rush your base, or something.
That's a very valid point since I feel the same way. I will add a minimum movement speed threshold to the enemies that feels good. To be fair the level spawns are not even close to being final but enemies that are too slow will keep being a bother even when they are final. Thank you for the comment.