Arc is a customized Redpill Loader for DSM 7.x (Xpenology) with enhanced Hardwaresupport, Addons, guided (semi-automated) Installation and more. Multiple customization options are built-in. It is modified to run on different Hardware (Wiki for more Informations). Commercial use is not permitted and strictly forbidden!
Killer isn't supported and will not come to dsm in the future. I225 is supported. but your hardware id is known as realtek id in linux device manager, so i don't know whats wrong.
Is NIC Killer E3100G supported? It seems to be based on the I225-V chip, but it is recognized as r8169.