Why would you be anywhere near the max gross limit of a light twin while doing powerline work, of course other than a belly hooked external load? Not being a smart ***, just don't know much about what you do.
That being said, on a cool day at sea level an AW109S at max gross would do fly away from an OGE hover of a few hundred feet OEI without exceeding any limits. Granted it would be a horrible airframe for utility work but that wasn't a stipulation in the question.