Going into the draft, here's what I had written down on my flowchart. Picks in each category are listed in rough order of how highly I value them, although it's really kind of variable depending on who I already have (for example, if I have Youmu then Yuugi's priority would go down).
Pick 1 - Minoriko
Reimu (if Minoriko is taken)
Tenshi + Sanae (if I'm 3rd and both Minoriko and Reimu are taken)
Pick 2 - Keine (if I have Minoriko)
Tenshi (if I don't have Minoriko)
Wriggle (if either of the above are taken)
If I have Tenshi, pick Burst archetype enablers next
If I have Keine, pick DPS archetype enablers next
If I have Wriggle, remain open (pick wild cards)
Burst archetype:
Enablers:
Kaguya (also decent enabler for DPS)
Ran (consider taking for DPS as damage dealer)
Yukari
Rinnosuke
Damage dealers:
Youmu
Suwako (consider taking for DPS due to PAR lock)
Yuugi
Kanako
Flandre (consider taking for DPS, but risky)
Shikieiki
Mokou
Yuyuko
Suika
Marisa
Maribel
DPS archetype:
Enablers:
Aya
Sakuya
Sanae (works better as a healer in Burst, as buffer in DPS)
Damage dealers:
Patchouli
Alice
Orin
Remilia
Chen
Komachi
Yuuka
Wild cards: (can work well in any party)
Mystia (high priority)
Reisen (high priority)
Rumia
Cirno
Try to avoid:
Utsuho
Eirin
My reasoning was that Minoriko was top priority because she can turn any half-decent tank into an excellent one for a low cost at any point in the game. After that, I wanted Keine, not that I thought she's a better tank than Tenshi, but because I wanted to try out the DPS setup instead of the Burst one, and Keine works better in the former than the latter (her SPD is too high to be a good switcher).
Next up I wanted to draft enablers and wild cards, with damage dealers dead last. Even if I went with a DPS setup, most of the damage dealers from the Burst archetype still work, just not as optimally. The DPS setup uses speed buffs to help characters with reasonably decent delays on their attacks stay in and spam their moves. This minimizes the need for switching, which allows Keine and Minoriko to concentrate on buffing and healing instead.
My actual draft picks were, in order:
Minoriko
Keine
Ran
Suwako
Reisen
Sakuya
Youmu
Patchouli
Flandre
Yuyuko
Shikieiki
Maribel
As the 3rd drafter in our pick order, I got to grab Minoriko and Keine first, which was exactly what I wanted. Both Aya and Kaguya were taken immediately after, so I decided to go with Ran to shore up my need for buffs. However, with my final team I might consider just building her as a straight attacker. But that's why I picked her here: because she has the versatility to fulfill either role. I also noticed that both Reimu and Mystia were taken, and I didn't really want Cirno when I stood a good chance of picking up Reisen, so I grabbed Suwako for the strong PAR effect.
For my next two picks, I got Reisen and Sakuya to finish off my team's need for utility players. Reisen was actually one of my highest priority characters (I value her almost as much as I do Mystia), but I correctly guessed that I could pick her up around the middle of the pack because I figured most people don't like her as much as I do. Sakuya was the last utility character I picked up because while she does fill an irreplacable role in my team, Raikaria already had a speed buffer and Pesco was looking to draft the Burst archetype, which doesn't need speed buffs at all. I might have even been able to get away with picking her later than I did.
With the utility requirements of my team complete, I was finally looking to draft pure damage dealers. Luckily, I already had Reisen, Ran, and Suwako, all of who are excellent damage dealers in addition to the utility they offered. By this point several of the good DPS damage dealers were already claimed (Alice, Orin, etc.), so I went with Patchouli and Youmu to cover both magical and physical damage. While Youmu does offer great bursty high delay damage with Slash of Eternity, her Flashing Cherry Blossoms has remarkably low delay for its power and could work in a DPS setup if necessary. Plus, her staying in lets me take advantage of her bonus SP focus in the early game. Flandre and Yuyuko were my next picks, once again covering two different damage types. Both have low delay moves that don't demand my switching them out, so they still fit reasonably well into my strategy (although Flandre is a bit fragile for what I want to do).
My last two picks were simply the remaining characters not on my "try to avoid" list. Maribel works as a second Reisen, just worse in most ways (but gains some merits in a Burst party setup). I was really surprised to see Shikieiki coming this late, as I figured whoever was drafting the Burst archetype would have grabbed her by then. She doesn't fit well with a DPS strategy, but sometimes it's nice to have a plan B that's completely different from plan A for situations where plan A isn't the best. Also, I did technically pick up a multi-target PAR spell, didn't I?
Anyway, I'm pretty happy with my team. I got most of the utility characters that I wanted, and while the damage dealers are somewhat interchangeable, I think I came out well with those too. My team looks to have the best early game out of all the teams drafted, but I've still got some late-game characters like Reisen, Flandre, Yuyuko, and Shikieiki. Elemental coverage looks great as well, missing only a good CLD nuke (which only Kanako has anyway). Overall, I'm quite pleased with how this went.