I was wondering what class would be good to go with a gestalt warblade in Dnd 3.5.

I am currently going with a rogue with a level in barbarian on the non warblade side of gestalt, (Buti think i can switch it if i want we've played for one day) my warblade wields a rapier and a shield oh and the rapier is Supernal Clarity from Diamond Mind and i have in possesion the balde of the last citadael as backup thoughts?

High str decent dex and int and good con other scores are 8