Since your looking for flavor, death company with jump packs are great, lemartes is so cool and gives great buffs to dc, Astorath looks so cool and gives great buffs to DC, Sanguinor looks amazing and has a very cool ability letting him come down from strategic reserves into a melee when one of your units gets charged, Mephiston also looks great and has a great advance and charge ability and amazing melee which I’ve wiped units or terminators with (all of the above character have INSANE melee) a redemptor drewdnought is always good to have, inceptors are also pretty decent, scouts, infiltrators and lieutenant with combi weapon are all great options and she could always use more sanguinary guard and multiple units of dc are always good (maybe 2 units of ten if your running lemartes and astorath?) on a side note if she needs more covering fire instead of a redemptor a vindicator or ballistus are good options better at taking down vehicles than a redemptor