When I played lockdown, a long time ago, before I realized that 4* knights are not welcome in tier 3 and get totally trashed by wolves clones, expert gunners, and pro bombers alike, I gravitated towards the guardian class. I was not good at handling the speed of the striker, and did not have a flourish myself, so I wanted to play defensive and support my comrades. Sometimes it went well. Strikers and Recon came to me for healing, I stood near fights to give my pals a defense boost, and fended off some attackers where I could.