I'm big on ultras as well. Almost all of the rigging points in my kit are an ultra. If I remember correctly they maintain 100% of the cordage strength in a choked configuration. I am also big on keeping the rope as the weak point in the system so we size up for the lowering device an terminal rigging point. IE 1/2 rope gets 5/8 slings, 5/8 gets 3/4, etc.
Otherwise there are a few deadeye's in the mix. All of the lowering devices have them and I keep a few long ones for blocks when we get into big diameter negative rigging or redirects on big trees. Also have a few smaller single rings on a deadeye for in tree redirects. Infinitely adjustable without being mid line attachable.
I've used alot of whoopies and loopies in the past and they never seem much faster than a dead eye with a cow hitch or round turn. That, and they gom up pretty bad with sap in the pines.