ArchbishopOfSloth
You should not go for many destructive worlds in his multiverse worlds because a lot of beauty will be in danger... For exemple his normal family would be in danger by being around the dxd universe. At the start he gained the ability to travel between world so it would be probably better to just travel to other world and **** with the plot without consequence.
Stick to one world, one anime, it become too troublesome and you can easily loose yourself if you add more than one. If you want to have more world go with normal one, like To Love Ru and other modern one, don't try to add different world where the rule are different (bleach doesn't go with magic world for example).