If you want to use event’s then why not just not use macro’s? There is no reason to bind yourself to using macros.
You say you have a custom foreachloop that you want to delay moving through the loop till the end of the tick. Why not just use the Tick event to do that?
How are you doing these traces, and radius checks?
If you would post some pictures of the blueprints that are causing it to both slow down, and where you want to wait for the tick it might be helpful.
Have you checked to see what is taking the most time/causing it to slow down? How many enemies/objects work well, how many slow it down?