You're always best lighting off at the maximum speed you can get.
Think about it this way; there's never an airstart checklist which tells you to reduce airspeed to the minimum possible to slow the engine down before lighting off.
The faster you can spin that engine prior to introducing fuel, the better, more positive, and cooler the lightoff and subsequent spool up. There are no detrimental effects from spinning it faster, either to the engine or the starter, and only benifits.