actually ranger / summoner can work.
Summoner doenst realy need a big stat investment and ranger, in many ways, lives off special arrows. Ranger has always felt lackluster to me because essentialy you shoot an arrow every turn.
Now, you might run into trouble trying to do a normal summoner build because youll waste a lot of your AP trying to buff your incarnate or make totmens.
I guess if you wanna go with that combination, you should stay out of combat for the first turn, summon your pet in, buff it on the first turn and then let the incarnate support melee while your character is focused on Special arrows and highground archery.
note that you can do some realy good mobility with tac retreat and the nether swap infusion for your incarnate
archer/summoner was a big mistake. i went pure ranger now and my DPS skyrocketed. it way more fun now. DOS2 lacks in hybrid builds. i always wanted a Thor build but it seems you either go Strength or Intelligence. You don't go both. Or you be gimped. It's similar like Archer/Summoner. back on to BG3, i'm not sure how D&D is going to implement builds/gearing. it be really interesting to see.
Also the issue with DOS2 is that i hate merchant farming and i have to do it or else i'll get subpar gear and couldn't even proceed with any quest. i like to see them improve or innovate in this regard.