@teralitha lol go answer your question yourself? Are you paying for anyone to spend their time answering your questions? Don't expect people to help you if you are this rude.
T3 arty is the closest thing to garbage most of the time. T3 Shields counter it hard and its an insane investment. someone could make 1 t3 arty and you could make 2 experimentals and just destroy their whole base before the arty is done.