So, I watched Technoblade's stream yesterday, and between the codenames and the idea of taking down people of power, I thought that the Syndicate may relate to the Phantom Thieves. So, here's my idea of his profile:

Technoblade – Code Name: Protesilaus / Persona: Snowball/Napoleon / Arcana: Tower

I chose Snowball and Napoleon mainly because of the theories relating the Syndicate to Animal Farm and how it will affect the story. The first one I heard was that Technoblade would take the role of Snowball, and be overthrown and chased out by his own system. The other was that he would take the role of Napoleon and would eventually have enough power to become an authority or government himself. Either way, he would have his questionable moral code taken to its limit.

I chose The Tower to be his arcana based on the nature of his character. The Tower symbolizes massive or unforeseen changes, and the idea of chaos and destruction. We already know how this fits into Techno's character based on his relationship with L'manburg. However, he himself has experienced massive or unforeseen changes, such as his many betrayals, or the Butcher Army.

Even the reversed tower fits his character. The reversed tower is often viewed as the refusal to change or accept change. While he may be an advocate for anarchy and external change, he's been shown to reject internal change through his stubbornness and belief that the ends justify the means. If the Animal Farm theories line up, we could see Technoblade finally accept change internally, flipping his card into the upright position.