I need some tips from a Rumbler

Hi! I have recently been playing AP Rumble top, and it has worked out very well... Sort of. In all the matches I did with this junkyard Yordle, I always exceeded 15 kills but I also always get a death count that is near that number. This is kind of weird for me because I generally always have a very good kda with little deaths and a lot of kills. Just with rumble do I get high deaths as well as kills. If anyone can give me some tips as to how to survive longer without giving up any AP damage, that would be greatly appreciated. Thanks in advance, and have a good day!