What programmer do I select in Arduino IDE for the ATMEL-ICE ISP?
As of V1.8.2, the ATMEL-ICE is now included as a programmer in the Arduino IDE.

The ATMEL-ICE was not available as a in-system programmer (ISP) in version 1.6.8 of the Arduino IDE.



On the 20th of Jan 2017, user facchinm added the ATMEL-ICE to the list of programmers in the IDE, and it was merged into the master on the 8th of Feb. It was released as a version on the 22nd of March 2017.