I am going to disagree on both of these one BT really doesn't hit isn't own to you play on some larger size playing areas. Then a lot of units that don't in little battlefields start making sense. Two artillrey is actually quit fun to use on the battlefield. Would I use it on a 1X1 map game no. But honstly I would rather not play than play on such a small playing area.
The funny thing is on 1x1 map the artillery would see its uses mostly, although it also causes massive amount of friendly fire meanwhile. Well it is unlikely to have a debate for the uses of 1x1 map on here. To me 1x1 isn't something even playable unless all the units both players will play is the infantry.
The size of the map is not my concern on here, though. Did you think that the size means the size of the map? Then it's sorry for that's not I want to mean - it's the size of the unit, the level of formation on each force. Perhaps a lance of armor would be playable, but I doubt for the battalion of those.
Well, TAG guided ammunition does exists thats an another topic, right? For it needs the actual hit of TAG, of the ground/aerospace units on there. Also as I know no TAG guided ammunitions have the blast radius of 1 or more.