Skyhammer can ‘throw granades’ while indoors, but as for Kira and Arty their options appear much more limited when it comes to indoors. Hence, I thought if it could be possible to have decreased AoE damage in the form of falling glass shards and/or concrete blocks for airstrikes and artillery. As for the laser; have molten concrete or glass drip down.
Something not as deadly as their abilities under open air.