My best tips for combat would be, group your enemies, a pack of orcs don’t each need their own initiative, having just the orcs turn and then the goblins turn makes combat a lot easier to keep track of! Also, label each enemy in some way, just so you know how much health each one has.
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Example: Big old Giant at the end of its first turn, grabs a tree. Second turn sets the tree on fire. Third turn chucks it at the players