Well there are three choices given to us there and we can have up to three party members...so yeah.
But if they're referring to all party members, I plan to rotate accordingly. Everyone will get several chances for action.
My ideal team usually consists of one warrior, one rogue, and two mages.
Variations include: Two warriors, one rogue, one mage. Or: Two Warriors, Two Mages. Or: One Warrior, 3 mages.
Yeah, sometimes I just don't bring a rogue with me. Despite the goodies they offer, combat wise I find them the most expendable.
Some combinations I've been coming up with are:
1) Mage Inquisitor, Vivenne, Cassandra, Varric.
2) Mage Inquisitor, Dorian, Solas, Blackwall
3) Mage Inquisitor, Sera, Iron Bull, Cassandra
4) Rogue Inquisitor, Cassandra, Iron Bull, Vivenne
5) Rogue Inquisitor. Blackwall, Dorian, Solas
6) Rogue Inquisitor, Cassandra, Iron Bull, Blackwall
7) Warrior Inquisitor, Cassandra, Varric, Vivenne
8) Warrior Inquisitor, Sera, Vivenne, Dorian
9) Warrior Inquisitor, Iron Bull, Blackwall, Solas
And of course, since this is now possible, let's not forget the ALL ONE CLASS PARTY
Mage Inquisitor, Vivenne, Dorian, Solas
Rogue Inquisitor, Varric, Sera, Cole
Warrior Inquisitor, Cassandra, Iron Bull, Blackwall.
Sheesh, the amount of ass-kickery coming from the all warriors team...crazy.