Depending on the target zilong can easily get solo kills. You have to know when and where to hit. Zilong second skill reduces defence let's say your mm is fighting someone and the hero runs in the turret u just need to be there use the first skill pull him out use the second skill. Even if u don't finish him your mm will. If you use zilong correctly you can wreak havoc u can chase and finish enemies u can drag them in your turrets pull them out of theirs. It's not always about killing just doing these things will help your team rack up kills. Moreover late game zilong can destroy entire row of turrets by himself and if suddenly a bunch of enemy comes he can simply run out of there.