Alphaleph
The Firstiest of First
It is unlikely that Anna used a Wave Force twice on a single target. Especially as the requirement to use it require Anna to use up all of her impeller and blow up half an arm. If Sekhmet survived that hit, the outcome would be either that it immediately fucked off with Anna unable to stop it or it killed Anna.Back under the dice system Anna could never did beat Sekhmet in any rolled out engagement. It is possible that Sekhmet ate more than one hit with the Wave Force before being killed. Still leaves one unaccounted use.
This seems to imply that Anna had set off a Wave Force strike prior to using it to wack Sekhmet. However the below from Operation Single Sweep indicates that Sekhmet was fed the first complete Wave Force strike. Bolded the likely relevant parts.
Personally, I would hazard that the first use was against Sekhmet, as was the second. Third goes to Saskatoon. Or maybe it went the other way around and Saskatoon got hit with two strikes and Sekhmet got one. Either way that accounts for three.
Same with the Hive as there are other AGs swarming to stop Anna.