New Pantheon is more prepared for support then ever! His level one starting with W got buffed since now he get extra autos on initial all in making his early pressure even more threatening. E now provides a shield which can now mitigate pesky ap supports damage as well as allow for tower dives even early on. Q also gained a slow with max stacks allowing for an easy W engage when landed completing a solid support kit.

Use your ult to zone the enemy when they are caught to far up landing the damage is not as important as cutting off there only route of escape.

Remember you are a tank and support and your goal is protect the carries. W can only target one enemy so use it wisely, dont hold onto it too long though as you max it for the cooldowns.

I have had a lot of recent success, but that being said this was in silver II. There is a good chance that this will not work in Gold or higher but if you want a more aggressive build that will work check out keegun's guide.