Shoot the three drop targets, then saucers all day.
Balanced
High; Very High for everything except the saucers
saucers.
Center “A” lane at the top.
Saucers are your biggest scoring opportunities here. Each drop target lights one saucer spot. Saucers have 3k base value, plus one bonus advance per lit spot, i.e. per drop target down. Balls entering the chutes on each side will score 500 and be kicked up towards, and usually into, the saucer above them. Any time you can nudge a ball into a chute, either at the top or through the gaps just below the drop target level, do so. Bonus multiplier is doubled from 1X to 2X on all but the last ball and from 2X to 4X on the last ball by completing A-B-C lanes. You can get B and C via the return lanes besides at the top of the machine; these are shatzable, but doing so is risky since the ball often ends up in the outlane afterwards. Base bonus goes up to 15K for max of 30K, or 60K on final ball. Completing the three drop targets also lights the upper side lanes “occasionally” for extra ball; only one is lit at a time, the process cycles on switches. Key feeds: the kickouts from the saucers.
via Bob's Guide
"Bronco" is a two-player electro-mechanical pinball machine released by Chicago Coin Machine Manufacturing Company in May 1964. The game features two flippers, four pop bumpers, two slingshots, two standup targets, and two kick-out holes.