I wouldn't use an IMO for group (true group). Go direct to the carriers. The IMO is going to make your price per thousand less competitive because they need a piece too.get appointed with a couple of group life carriers or an IMO that has access to several
I don't have a ton of experience in this space but I have had more than one IMO group (where I'm close with my contact) tell me to just go direct when I've found opportunities.