ah the fortification doctrine,when is relic fixing the ultra shitty zeroing artillery....??? just make it as good as it was at the wfa launch and maybe reduce the muni cost by 50.
Just give it something like the Brit's tact support arty.
37mm gun barrages infantry and light vehicles while 88mm and 128mm guns fire crippling volleys at enemy tanks. Give it same zone as the British one, but only allow it to be used within friendly sector.