dantrt

Go catch an Excadrill in the desert. It could help

Excadrill was suggested to them when they requested assistance yesterday, and it apparently hasn't helped too much...

On tactic that might prove useful for you would be to find a way to steal the Field from her, since Fairy Tail provides her entire team with damage increases and a neutralized weakness (especially her klefki and aegislash).

--Electric Terrain would give a solid attack buff that's at least neutral to most of her team (note that her excadrill will remain immune to Electric attacks).

--Psychic Terrain outright prevents her scizor and aegislash from using their otherwise devastating Priority attacks.

--Inverse would turn her Type's greatest strength into a weakness (well, a substantial collection of weaknesses, anyway), but malamar and smeargle are the only pokemon that can force that on into existence, so it'll take a bit to get them up to par with the rest of the team.

For what it's worth, I was able to beat Titania with only 3 Pokemon.  They were Klefki, Delphox, and Diggersby.

You can see what the strategy was on my 6th gen monorun thread

EDIT:  Should note that for items, I used Elemental Seed on Diggersby.  The other two don't matter as much, but I'd give Light Clay to Klefki and Flame Plate/Charcoal to Delphox just to be safe.