Paper 2D - Spawn random enemies in a tileset (for arena style game)

I’ve been Developing a 2D platformer arena game, as the title says. (using blueprints)

I’m having some issues trying to spawn enemies in the arena, i was using SpawnActorFromClassNode, but the enemies stays in mid air when they spawn, also, there is more than one tilemap, so i’m having quite a trouble in the dynamic spawn per tilemap, does anyone have an idea to make custom Class with tilemaps and their own spawning points? Thanks.