1850 list for Local Tournament

Hey all,

Been out of the competitive 40k scene for a few months, but am organizing a tournament at my local gamestore to get right back in. The tourney is 1850 points, with no comp. Points for painting, theme, and sportsmanship as well as overall winner. I've been using a Duke Siliscus list that has been a ton of fun, and want to see how you'd make it more competitive. Curious to see people's thoughts.

HQ
Duke Siliscus

Elite
4 blasterborn, venom, 2x scs, nightshield
4 blasterborn, venom, 2x scs, nightshield

Troop
9 warriors
3 x 10 wyches, 2x hydra gauntlets, hekatrix w/ agoniser, raider, flickerfield, nightshield

Fast
6 reavers, 2x caltrops, 2x heatlance

Heavy
2x voidravens, flickerfield, nightshield

Run Duke with the warriors, hunker down on a home objective in my deployment zone. Rush the rest of the army up one flank, very point and click- darklight and blasters to take out vehicles, wyches, reavers, and venoms to take out infantry and hold objectives late game. Reavers and voidravens run interference and annoyance once vehicles are downed. How would you change it? I prefer to stick to warriors and wyches vs wracks, grotesques, hellions, and beastmasters.