Alright, well that's good to know, didn't feel like going through Orbat again to add those artillery units.

@JD_Wang I often use vanilla artillery/MLRS for artillery support and it's as reliable as normal (ie don't count on it in an emergency :P )

Hehe, I get what you mean, the delay between calling the strike and when the shells hit the ground can make a difference between life and death. Also reminds me of that quote: "Air strikes always overshoot the target, artillery always fall short".
Anyway, thanks for the replies!