This is a good Incendiary to delay enemies from defusing the spike after you've planted it.

This is a good post plant Incendiary for B Site to delay enemies from defusing your spike.

These are the default smokes for B Site that you can use to cut off all access points into the site allowing your team to take the site and get the Spike down.

These are the default smokes for A Site that you can use to cut off all access points into the site allowing your team to take the site and get the Spike down.

This is an easy post plant setup that will allow you to play time and shoot your incendiary stopping the enemy team from defusing the spike.