Q:
What class to play with a ranger
I believe the guardian has the highest survivability so that’d be your best bet. You could pull a lot of enemie attention towards you while your sister picks them off from a distance.
I think its more of, what class appeals to you and then the both of you selecting weapons and skills that fit how you want to play.
Here are some examples of what I mean:
If she wants to play her ranger using a longbow primarily, then I would select a class for yourself that can also do damage at a range. For example, if you play a warrior you could use the rifle and bow as the weapons of choice while playing with her.
If she is going to mix in melee with her ranger, then you could have a warrior with a range weapon that swaps with a melee weapon.
Lets say you are playing a necro and using marks and wells and she is using a longbow. She may use a longbow skill that pushes the target away from your ground areas and that lessens your effectiveness. However, the necro could use minions instead of marks and wells, and it wouldn’t be as much of an issue. OR, if she used traps combined with the marks and wells, you would both benefit from the combination.
I think to what to keep in mind is, at what distance from the target will she mostly be playing and which classes have weapons/skills that will also reach the target. Most classes have options for ranged and melee fighting styles so as long as you work together to be synergistic, you can play what you want.
The main thing is that you will just need to look at the weapons and skills available to your classes and make choices that work together rather than choices that will be frustrating to one or both of you. I’ve seen it from both ends, I’ve accidentally annoyed people with my ranger by using the knockback skill and I have a necro that uses marks and wells and I’ve had rangers and other classes use knockback skills that prevent the targets from receiving damage from my necro skills.