In that case when the respec comes i probably won't even bother with weapon and shield efficiency as i keep both over 50 99% of the time, so spend the skill points elsewhere.
Warp Core Training, Shield Maintenance and Efficiency all boost Emergency power to shields - and the efficiency stats do add a small boost at 50 - about half the boost given at 25
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Nope. Emergency Power to Shields is affected by Starship Warp Core Training, Starship Shield Maintenance and Starship Shield Efficiency.
If you press P to bring up the abilities window and select an ability, the description will list the three skills that affect the ability (if any).
Also RSF is my favorite ability in the entire game ^_^