Tiger/Gemini and Dog/Gemini come in at 88-93%, allies by ancient design and co-agitators by Gemini temperament. The Tiger supplies the charge, the Dog supplies the cause, and the shared Air-sign quickness keeps the whole enterprise articulate.
The Tiger loves boldly and a little theatrically; the Dog loves faithfully and watchfully. The Dog is one of the few signs that neither flatters the Tiger nor fears it, which the Tiger finds unexpectedly restful. In return the Tiger's courage steadies the Dog's chronic worry.
Both have opinions and the Gemini fluency to argue them beautifully. The Dog appeals to principle, the Tiger to instinct, and their debates tend to end in better plans rather than bruises. Neither wants a silent partner, and neither got one.
The Tiger's vanity and the Dog's bluntness are the standard flashpoint: one criticism too direct, one reaction too grand. But the Dog does not play games and the Tiger does not hold grudges, so the air clears fast and stays clear.
The Dog gives the Tiger's rebellions a moral shape, turning defiance into leadership. The Tiger drags the Dog out of cynicism and into the arena. Both signs are idealists at the root; together the ideals get legs.
At 88-93%, Tiger/Gemini and Dog/Gemini are a natural match. A crusader's alliance with double Gemini eloquence, loyal at the core and lively at the surface.