Are you planning to use the koldun lord to marshall the destroyer? That's what I'd go with.
On the mechanics, personally at 35 points I think you can get away without them. I'd be much keener to get the
ifp and the widowmakers on the table. How about this:-
The Butcher of Khardov (*6pts)
* Juggernaut (7pts)
* Juggernaut (7pts)
Koldun Lord (2pts)
* Destroyer (9pts)
Iron Fang Pikemen (Leader and 9 Grunts) (8pts)
* Iron Fang Pikemen Officer & Standard (2pts)
Widowmakers (Leader and 3 Grunts) (4pts)
Widowmaker Marksman (2pts)
Unfortunately this leaves no room for the war dog, who is great with butcher... I guess you could drop to min
ifp and add wardog and a manhunter. I'd be keen to keep them maxed though as they work very very well with butcher's spells. Also, consider swapping a juggy for a marauder (same points cost), underrated jack
imo and can cause serious caster squishing damage on the butcher's feat turn, clearing charge lanes, causing knockdown etc.
Edit: the other option is to swap the
ifp in my list for full shocktroopers and the wardog, seeing as you said you wanted to spam durable beatsticks

This would give you a very effective screen for Butcher and the Koldun Lord, at the cost of some speed. Personally I love the shocktroopers as they often take up so much of my opponents resources to dispatch, but it's personal taste.
Edit 2: Taking this idea even further, this list would get you to tier 2 with butcher, giving you a very valuable speed boost for the mows on turn 1
The Butcher of Khardov (*6pts)
* Juggernaut (7pts)
* Juggernaut (7pts)
* War dog (1pts)
Man-o-war Demolition Corps (Leader and 2 Grunts) (6pts)
Man-o-war Shocktroopers (Leader and 4 Grunts) (8pts) (-1 point on the tier list)
Man-o-war Kovnik (3pts)
* Destroyer (9pts)
This is starting to stray somewhat from your original list, but gives you a rather delicious 3 jacks and 9 mows on the table which is a bit evil on butchers feat turn, especially at 35 points. The destoryer on the kovnik will benefit a lot from his boosted attack ability, leaving the jm bonus for the damage roll. On the feat turn, this gives you a direct hit on
def 16 with an 18" threat range and effective pow 28 with average rolls, thats going to all but squish a lot of casters.