Reverse as required - but rev idle by 70 knots - unless you REALLY NEED IT!
Forward idle i.e. reversers stowed just prior to exiting the runway to prevent risk of FOD ingestion.
Spoilers disarmed after vacating and slowed down - 1. Because there's no hurry. 2. It ensures that the weight stays on the wheels (brakes) - I've seen it done at 60 knots during roll out. 3. It's a trigger for the PNF to complete the after landing scan which only needs to be done when everything is slowed down and both of you know where you're going (taxi route).
Keep It Simple.
