Optimal comp

So I’m doing a tactician plus nightmare mode run with 300% bonuses so I’ll need a pretty good party comp.

My thoughts so far are:

• Ssb (MC) - Duegar
• Astarion OH monk
• Shadowheart Gloomstalker assassin
• 11/1 sorc wyll

But thinking about it there seems to be a lot of overlap with the sorlock and ssb. They both are there for control and CCing enemies but I’m a lktttle concerned that they fill the same role?

What else could I consider?

My thoughts are a throwzerker (which I’m not super keen on) or a cleric for buffs.

How would you optimise this comp?