(Edit) You should pick up a sword instead of a horn at first phase so you can pick up immediately after Boss Bokoblin dies to save more time.
i found that 3 zuggle with sword and spear is enough for 1 cycle ganondorf for some reason. (the damage calculation looks weird)
spear is 34 and sword is 37.
4 zuggle with only spear: 34*5 = 170
3 zuggle with sword and spear: (37+34)*2 = 142
however, they are almost same damage...?