If you are having trouble using Spikes in combat, whether if it's a 1v1, 3v1, 5v1, 5v2 or whatever you're doing (minus base building), then this video may help you in combat. Keep in mind that it can be fairly easy to fail if you press the wrong hotkey, not paying attention or fighting/surprising fully prepared.
Music from Epidemic Sound (http://www.epidemicsound.com)