Most obvious, buff on a stick for golems.
Others
- Golem blitz
- SoFr Golems
- Flooding
- Tidal healing
- nightfall - loadstone synnergy
- bypass wings
... ooh... forgot to add ranged in there too...
Partly, this is in anticipation of adding more "trait" synnergies eventually (i.e. interactions with airborne, ranged, nocturnal, golem, and aquatic traits).