Check the pivot bearings near the rear axel if you have them there – they don’t move much, but are really prone to getting dry/knackered.
I second this (although I own an Anthem – exactly the same suspension design though). The two big bearings on the chainstay linkage are prone to seizing / rusting if you live in a damp climate and / or wash your bike regularly without somewhere to dry it afterwards i.e. most of the UK.
I try to take everything to bits at least once a year and give a thorough cleaning to all the linkages / bearings / bolts although the only creaking I’ve had on this bike has been due to a loose chainring bolt and some gritty sand getting between the seatpost and seatpost clamp.
People will tell you not to spray GT85 / MO-94 or similar anywhere near bearings but in my experience a very, very quick blast between the linkages (but not directly onto the bearings) once in a while after a deep wash seems to keep things ticking along nicely.