The plan of attack on a Second Death Star, in general, was:
The fleet initiates major action, drawing attention of the Imperials
A commando team - slipping in all the hubbub under Imperial noses with older codes - lands on Endor's moon and disables the shield generators projecting the shield around Death Star
A rebel force attacks Imperials near Sullust to lure the Imperial fleet protecting Death Star elsewhere
The rebel fleet's small craft attack and destroy the (supposedly defenseless as per the prior bullet point) Death Star (which had supposedly NOT had operational defenses), by detonating armaments in its internals.
Is there any canon confirmation that the overall strategy was developed by Admiral Ackbar? (as opposed to others developing it or participating equally with Ackbar)?