I like droppods, its good to keep at least one crusader squad in a droppod to plummet in, this is especially good at hurting Tau.
they do have a lack of sergents, but by adding a chaplain to the squad you make them automatically pass their morale check to surge forward, plus he comes with a crusader seal so the whole squad can reroll (keep in mind that an independant character confers this ability to a squad he is attached to)