1) Contriver 2) Deviser 3) Military strategist 4) Planner 5) Strategist 
• (n.) One versed in tactics; hence, a skillful maneuverer; an adroit manager.
Tac·ti'cian noun [ Confer French tacticien .] One versed in tactics; hence, a skillful maneuverer; an adroit manager. 
HMS Tactician was a British T Class patrol type submarine of 1090 tons displacement launched in 1942. HMS Tactician had a top speed of 15.25 knots surfaced and 9 knots submerged, carried a complement of 53 and was armed with one 4 inch dual-purpose gun; one 20 mm anti-aircraft gun; three machine-guns and about ten 21 inch torpedo tubes.
[n] - a person who is skilled at planning tactics
tactician 1. Someone who is skilled in the planning and execution of military tactics. 2. Relating to tactics or done in order to achieve something.
noun a person who is skilled at planning tactics