On my safari, we had 3 hunters (me, my brother, and our step father) and 2 PH in camp. We spent our 5 hunting days splitting time hunting 1:1 and 2:1 getting both the comraderie of hunting with the others plus chances to go for our own trophies. On the final afternoon, we even went to a watering hole blind and sat 3:1 but with specific game in mind so there was no competition of who would shoot or busting animals with too many trying to stalk.
As many have said, 1:1 is the best for trophy hunting, 2:1 is better for hunting with a partner and sharing the experience plus maintaining good stalking or trophy opportunities. 3:1, where allowed, would likely be ideal for lowering total cost, for long trips or groups with short lists, or for the purpose of hunting together.
I don't think there's a right or wrong answer here, as long as you understand the pros/cons of options and it suits your style. The last thing anyone would want is to have an unsuccessful hunt or feel like they "wasted" money on a trip that didn't meet expectations.