The vast majority of the Arena parties at General(my rank) are led by Kikuri. Most of the rest are either Sefia, or a different light/dark unit with Kikuris and Sefias behind it.
If I am trying to hand pick an easy party, I'll be refreshing a lot. And to me that's simply not worth it to save a few thousand Zel.
...
And I'm actually startled to see the Eze. The Arena just isn't as much fun as it used to be.
Ironically, though, for me, it's usually the other leaders that end up having the scary teams (and for some reason, I always lose to Lorand teams, even if they don't seem all the impressive; my team just fights stupider when those show up). Aem and Aisha, especially, are the scariest, since they could be packing anything, and you could get hosed by BB spam.
Anyway, here's my record on start dungeons, so far:
Eze: 1 run at Lv. 1, no drop, stop (Anima Eze was my starter, and I got another Breaker from Honor Summon, so I'm good)
Magress: skip (got Lord from Honor Summon)
Selena: 1 run at Lv. 1, 4 runs (used Gem) at Lv. 2, no drop, time over
Vargas: 2 runs at Lv. 2, 3-star Anima dropped (I might try to get the 2-star version for collection purposes, too)
I'm still missing Selena and Atro, so I'm going to try to get them tomorrow.