Sorry for spamming

somewhat more optimized version of the P5 Beast Trapper:
Now with Might Merc. He gets into trouble occasionally, but Mind Blast helps in those situations. Also used a respec to get 3.2k life and more importantly FB synergies (4.4k max FB damage vs ~2.8k previously) .
Run times improved to 2m13s - 2m22s. Clearing a good amount, though I skip some around the Cow King since I didn't get a map with red portal near him yet.
Again, just treating her as a Necro who uses FB instead of AD, and it seems to work just as well as AD. Possibly even better. She is literally using nearly the same gear a Beast Necro uses, almost all of it is borrowed from my untwinked 99er Summoner. Only differences are Phoenix and Raven, and circlet and ammy are for Sin of course.
Glad to see the phoenix main hand, works well enough with FB.
It's perfect really. Apart from increasing FB damage and general running comfort, I noticed another advantage: Sometimes after killing a group you realize only when teleporting away that there is another group next to it. In those situations I can now just stay on Spirit/Tele switch to lay down more DS to make use of the existing corpses, without any risk of Redemption taking them away. With Phoenix on Tele switch those could poof away, and that would often mean starting over the whole sequence.
EDIT:
Also took her to P7 for a while, trying to beat Java times, but didn't quite get there. Runs were around 3 min or less, and maybe she clears a little more fully than Java, but not enough to make up for some ~20 second difference.
But that doesn't mean this build is less efficient when running P5. In fact, I am extremely surprised by how strong this is. The 2m13s run above was a pretty full clear with pretty normal density. That is just crazy in my book.
It may be too early to jump to conclusions, and she needs to be tested more (again checking kills over time via rune drops, XP count etc.)... But this is one of the best cow builds I've ever played, maybe even the best option.