You can't claim stand your ground if you go looking for a fight. If you haven't gone looking for a fight and someone is going to beat you up, then you should absolutely be able to kill them. Stand your ground is in place for those times when someone is assaulted having not engaged the assailant violently or in a way that would give the assailant reason to expect bodily. The quintessential stand your ground case would have an assailant engage a victim (in a place the victim has a legal right to be) and that victim then turns and uses lethal force against the assailant. As long as the assailant engages the victim in their crime and the victim then responds, that's stand your ground. Stand your ground says that you take your life into your own hands when you decide to have a fist fight with an unsuspecting victim. This is as it should be.

Edit: One thing to bear in mind is that stand your ground is a self-defense claim and the use of unreasonable force would still be a crime. However, if the victim's only response is to take one action and that action results in a death, then they have not violated a law (regardless of their ability to retreat). If the assailant continues the assault beyond the victims first response, then that victim would be able to respond further (just the same as any other self defense claim). While the assailant remains a threat, stand your ground remains valid.