If you do not have a speed set and want to run kt4 in randoms with people with speed sets I know a way for you to get more energy.
There is a video below I made with me talking explaining it if you don't want to read.
1st you need fast remap. This is when you quit to menu and press play. It sends you to the front of KT4. To do this you need to clear kt4 once and exit through the door to the entrance. Enter the map and you are set.
In kt4 as a nonspeed set user you just want to run half way through the map. You do not go into the little hub spots to kill enemies, you let your speed set team mates do that. If energy drops run grab it and remap. Do not try to catch up because they will be far ahead of you. If no energy drops then simply move to the next hub spot. You do not want to run on the left side because you can not see drops and you can not get drops if you do not render enemies on your map. So remap at the very top hub spot after it is cleared. Good Luck.