Kharnalex, The First Light Macro?

I am trying to create a macro that uses Kharnalex, The First Light when it is available. I have the following…

#showtooltip
/cast [@mouseover, help, nodead] [] Living Flame
/use Kharnalex, The First Light
/run UIErrorsFrame:Clear()

It doesn’t appear to work and constantly tells me the item is not ready. Ideally I would like this to cast without any errors. Anyone know how to create this?

Can’t combine 2 things that are on the GCD. Give it a dedicated keybind.

Thanks I realized this after creating the topic.