I would go with an Akhan condemn crusader. Its incredibly strong and versatile, so it will be easy work in T13 yet still allow you to tinker with a swiftmount into the cube and a couple of pieces of sages for the extra DBs.
The drawback is its a high cdr build so getting the right pieces can involve some perseverance but It is really worth it.
I switched back from Crusader to my beloved Wizard because of the issue of Speed runs (T13 and low GRs)
Condemn, just is not as fast as Wiz or Monk. However you slice it you need some kind of Teleport for mobility to keep up.
I tried everything making my Crus at least as fast as possible (which also was a demise cus I had more trouble picking up items with too much speed),
with instant casts (Unleashed, ...it's beyond me how some Crusaders run Vacuum in speeds, can't even comfortable use Steed Charge this way without waiting an eternity for the next Condemn cast....)
and not dependant on Focus Restraint (no Generator Skill every 5 Sec which makes every build kinda uncomfortable for me too, it's time not moving, not picking up nor killing monsters...).
So from a really optimized point of view Crusader is weak for speeds.
Just saying, overall every average player can be fast with every class and enjoy it. For me, I can't go back cus I feel that it lacks a bit.