I like using fast units or shock troops. Get in, get out. I want to finish fights quickly but have some flavor to them other than "I use these guys cause they have shields." I definitely like Druzhag better than Kardush so I'm switching him out. Also, I don't like shooting rules with WotR because I can never hit with them, even crossbows without penalty. I killed an elf army in a 1000 pt match and he had +30 dice per round to shoot and killed only 3 or 4 guys per round.
But that's Elves, they don't count. That would have been about half his army
If you like fast shock troops, something like this might be in order:
Druzhag 110 (watch out, people will complain about him)
Uruk-Hai Warband - 6 coy, shields - 210
Uruk-Hai Scout Warband - 4 coy, shields - 140 (possibly swapped for Phalanx)
Uruk-Hai Scout Warband - 4 coy, shields, captain - 190
Isengard Orc Warband - 6 coy, 2HW, captain - 170
Uruk-Hai Warband - 3 coy, crossbows, captain - 155
Uruk-Hai Berserkers - 110
Feral Uruk-Hai Warband (convert them out of Uruks with Pikes or Scouts)- 4 coy - 140
Morgul Knight Regiment - 3 coy - 105
Isengard Troll Captain - 150
Mauhur's Marauders - 3 coy - 190
Put Saruman in the big uruk block (I hope you don't object to having a few of them?), Lurtz in the captainless scouts and Thrydan with the Berserkers. Then sprint the whole thing forward with ATD, and ambush the Ferals behind your enemy. Call Heroic Fights with your combat formations, and Heroic Shoot with the Crossbow Uruks (believe me, you will hit a lot of things with them. Against Haradrim I nearly killed a formation a turn with them). And KEEP SARUMAN AWAY FROM DUELERS. On how to do this, check ,my own Isengard army thread (on page 2 now, I think). That should be workable enough, and has plenty of fast formations. Problem is enemy numbers.
"... Telchar wrought it in the deeps of time."
-On Andùril, The Lord of the Rings