In reply to westmorland:
Don't confuse it with D Gully buttress from below
The access via broken ground has one icy step where crampons and helmet are often required with or without rope/belay
The bit above this in the bottom of Crowberry Basin can be a dodgy slope with significant avalanche potential
The most technical moves are in the bottom 6 m of the ridge
They are avoidable by continuing up the gully past a small icy step then break back left onto the ridge after about 20 metres or so
Don't pitch the whole damn thing, move together with a short length of rope between you placing runners
The right facing corner high up is easier than it looks with a good stance below it
Snow slopes above can be dodgy as described above
Have an agreed descent plan in your head and the bearing on your compass before you leave the car. The summit ridge can be surprisingly confusing and it is easy to lose the path and everyway is down so it is easy to veer off
If the Tulaich descent is dodgy, continue round the spur for a fair way and pick an easier way down
You don't need much gear, or two axes
Post edited at 11:01