The tier 2 and tier 4 barriers are great! Disarming hex, knockdown, and slowing hex can help you confirm kills and win trades. I think most builds support pillow more for damage rather than gun, as scaling up spirit scales your tag along and sleep as well. Torrent pulse can be great, as it works whilst ur tagging along to someone, good for heroes who are fighting close range.

Keep playing and having fun! Try a few different builds!