Due to the odd shape of some of the actors I was trying to remove, I had to scale up the range of the “Get Indexes in Range” to make sure they were all gone
It didnt affect units but if walls or other tile items were caught in the crossfire their cost was set to 1 and so I could walk onto them.
So instead I decided to add two arrays into my tile base (VectorIndex and IntegerIndex)
During the “Add Viewport Terrain to Arrays” linetrace I cast to the hit actor to see if it was the tile_base if so add the vector and index value to appropriate arrays.
When It came to removing the base I didnt bother getting indexes in range, Instead I looped through the integer array of the base, using the element value (indexes of the base) and changing the cost to 1 before the actor was deleted.
Its probably not that efficient so if you have any suggestions or feedback id appreciate it, but atleast this way It alters the indexes in question only and not any others surrounding the tile.
Edit: Thinking about it, I just needed the IntegerIndex array