Predecessor Builds > Argus > Argus Support Build (v1.02)
Best build based on my tests and what I feel that Support Argus needs for each stage of the game. All Ranged/Enchanter Supports will be building 3 DMG/Supportive Items, and 3 Defensive Items at some point throughout the game. Swap items around based on the game or personal preference.
Generally you should win lane with Argus Support if you hit your stuns. Play kind of aggro, but know your limits on what you're allowed to do. Zone the enemies off waves and capitalize on them if they don't respect your lane's damage. Against Steel specifically you win level 1, but once they hit 2 Steel jumps on your carry when you stun theirs. Riktor is a skill matchup, but it generally isn't in you favor; so if your carry gets hooked immediately stun and jump on the enemy carry to trade damage and save as much of your Carry's HP.
In team fights you are not generally there for Damage, but there for follow-up and peel for you team. Keep an eye out for major outliers that will jump on your carry in team fights.
Can opt for a damage support build if your team has low/no Magic Damage.