At 25 I have been running Vicki's, Taelor, Misaki, 2 Ronin. 0 Soulstones. I normally choose to go 1 less scheme so that they have 2 soulstones, and I love it. At 35, I would just add Hans or the Convict Gunslinger, possibly Student of Conflict. I haven't tried running Hamelin with them yet, I am interested in it though. My Vicki's die pretty fast without the soulstone support, but it gives me time to get my other big guns in position.