For war, make only COMPLETED L1 Inferno tower/xbow available in clan war base
As you know, some war clans like to use the 8.5 and 9.5 system so they have less weighting in war to draw an easier match. However, some will start building ITs/xbows on prep day (so that the tower would be operational in their clan war base), only to cancel the construction after prep day. This is a loophole, and shouldn't be abused as IT and xbow can really affect war match making. This can be easily solved if only completed L1 IT/XBOW are operational by end of prep day. I did a search in the common ideas thread, and I didn't see any mention of inferno towers.