Tactical advantage is "From" the tactician personality? "The Shadowed Estate of the Scorpion" ability, can negate the effects to tactical advantage?
Modedit: Title spelling edited
Tactical advantage.
A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
Your reasoning is correct.