The rival system is a very tricky tool. It gives great advantages but to discourage opportunistic political posturing. Where in prior EUs I'd sit on the fence all game and try to stay friendly with bigger locals, that method in EU IV leaves a vulnerability - I don't get the bonuses of shared rivals.
I'm really curious how people are using the new rival system. For instance, I'm tempted to make my 3 regional powers my rivals even though I have an alliance with one of them and am friendly with another. Really struggling with how to balance this new system. Also, playing Ironman makes it so I can't just try something and reload if it has some unexpected catastrophic effect. For instance, if I declare my ally partner a rival, will they hate me and no longer come to my aid?
I'm really curious how people are using the new rival system. For instance, I'm tempted to make my 3 regional powers my rivals even though I have an alliance with one of them and am friendly with another. Really struggling with how to balance this new system. Also, playing Ironman makes it so I can't just try something and reload if it has some unexpected catastrophic effect. For instance, if I declare my ally partner a rival, will they hate me and no longer come to my aid?