Creating maps with barriers wich have to block many enemy types is not really possible in map editor, because barriers usually block not enough different types. Currenty there are two solutions to this issue:

1. Stacking several different barriers on a track that block different enemy types so you get the effect you want. But this methode does not work if there isn't enogh space for several barriers like if you want to create a map like 3.4, 3.7, 5.4 or 5.b1
2. Just don't create such maps

IMPORTANT: So I had an idea to solve this issue: Combining 2 different barriers to 1 barrier, that blocks all enemys both barriers would have blocked together. This feature could be somewhere in the crafting interface and should also need a specific research and resources (depending on how many enemys the new barrier can block) for each crafting.

To make barriers even easier to use, the player should choose in the map editor if a barrier should block an enemy type it could block (a change is never final).