[Si Coe]

As said towers, wishbones and front uprights.
Carbon towers do help a lot - I've also reversed the shocks on mine (behind the tower instead of in front) and haven't broken a tower since.
Alloy front uprights stopped that weakness without an increase in broken wishbones.
All my hinge pin holders are alloy too.
With that lot fitted nothing mechanical has gone in over a year. In fact the biggest problem I has was with the slipper till I switched to an Avid.