There will be two similar path, full damage, just different items priority. It’s up to you.
For this, you will be getting lifesteal and more damage first, more sustain early on, damage isn’t too bad. Lifesteal works very well with Argus’s passive double hit as well. Followed up with critical damage items for huge damage boosts.
This would be the Scarlet Phantom first build. Huge attack speed boost, decent damage, faster clear speed. It’s really amazing. You could even follow up with Berserker’s Fury instead of Haas’s Claw for insane damage boost early on. Your survivability without lifesteal early game isn’t too bad, you have your ultimate to survive most of the fights.
Argus’s is mainly focus on basic attacks, the more you attack, the more your passive procs, and more damage of course. You may not want to being stop by crowd controls. With Purify, you can be unstoppable.
If you would like more offense options, Inspire is fine. Or even Retribution to farm quickly early on.