Farm, farm, more farm. If the enemy Solo is out of position let your jungler know and farm them too.
Be annoying, dive the backline and ult out if need be. Your job is to be IN FRONT of your team. Be an initiator but don't play like an idiot you can still die. If diving isn't working you can still initiate but fall back to help your backline. If you don't want Shell of Rebuke you can keep normal shell and get a Pridwen for more sustain.
