I highly discourage you from using Flares' guides. Leaving aside his abrasive personality or the fact that he has been banned in this server for brigading and harassment, quite a few of his takes and advice are either old, a meme or heavily leans towards his playstyle.
As a new player, I would suggest reading Cheri's guide instead if you haven't done so already.
As for teams, if you grab today Vortice you can make the much better Vortice/Tawil/Hameln/flex (Murphy, Celeste). Assuming this is for dtide, you do not need to aim for 425 in the first place, much less so as a new player. 400 is where the rewards for dtide end, and depending on what resources you want, you can even stop pushing in intervals of 25. This means that you don't have to focus on making more than 5 teams, and one of them should be made with a borrowed whale dps that will carry the rest of the team.
Another thing, lemurians is a team that requires deep investment across the board for it to feel good, due to its survivability relying heavily on shielding from tentacles and GMurphy's arc2 talent. With deep investment I'm talking as high of a level as possible for everybody, high dupes and high arc2 talent levels across the board. Also, Goliath is a mainstay, you pick between Faros and Tulu as the 4th slot.
I don't know enough about Sorel to recommend teams for her beyond knowing that Saya and Pickman work really really well for her. Same deal with Gelot. What I can say though, is that a potential borrowed team with what's left could be Ryker/Helot/Faint/borrowed Mouchette.
I believe Castor/Jenkin/Horla/flex could work. You could also go the counter team route with Caecus/Winkle/Horla/Castor, although in this scenario you would want to grab a copy of Arachne.
Overall, with your current roster I would seriously consider pulling Vortice.
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