Nah arty people don't need a guard unit, if you really want guards, get a regiment to protect you ...
But, the ability to also have a ramrod as arty train would be pretty handy indeed.
As of right now especially in public servers it's relying on teamwork, and there is soooo much teamwork on public server servers it's amazing... :/
I've seen a lot of people go arty train then suicide and respawn as ranker because they don't start with a ramrod.