I think you'll find some of the MRR sales & customer-success related metrics also cross over into the ARR world:

Sales metrics:
- Length of sales cycle (# of days at each sales stage)
- # leads / week
- # of attempted calls / week
- # of completed calls/demos / week
- # of deals closed / week
- # of lost deals / week
- Close rate
- Customer acquisition cost

Customer success metrics:
- Renewal rate
- Upsell rate & value
- Utilization rate
- Lifetime value
- NPS