gxe1134 I have wondered if this is the correct interpretation as well. But I doubt it, because the number gets larger as you level up the tactic. If it is a bad side effect, like reduced HP on betrayed units, it should get smaller as it is upgraded, and not bigger.
But the numbers shown in the armory and the numbers shown in the war academy do not match at all. In the war academy, I show level 1 as 9s, speed bonus as 250%, and Damage reduction as 100%. And that is all the stats it shows. The upgrade to level 2 increases duration to 11s and damage reduction to 150%. In the war academy, level 1 shows a 10s duration (library boost), a speed boost of 100%, damage reduction of 100%, Damage increase of 200%, and attack speed increase of 50%. So a different speed boost, and two stats boosted that aren't shown in the armory at all.
It looks like this is another MRL scale screwup in the stats department - things are being shown in very different ways, but it isn't obvious how or why or what the current numbers are in ways that players would understand them.