The only summons I never see in Luke vids are Freet/Hodor/Hulk/Glaerin. These haven’t been good in forever anyway, so it makes sense.
Every other summon is used and seems to do fine from pubs to statics to 4 man sell. You can even go no-spirits(aside from Eche) if you feel.
As for weapons like Wailing and SLP, the double summons disappear as soon as you un-equip them. So pretty useless now outside of SLP giving +2 Zealous/T2s and +3 Eche with the CDR stuff.