Blessed Ignores even ground so keep that in mind.
Scarsfells should be able to build up synergy enough and do some damage to soften up for the stalker to kill 2-3 champs and sprint out.
Madrack usually plays pretty forward and is rarely camping. Take advantage of that by threatening an assasination with the Judo goat or a souped up Scarsfells. If he casts Even ground and casts guided hand, he will be camping 1 leaving him vulnerable.
Even with guided hand, after you feat champs will need 10’s (8’s with fell caller) to hit the birds, means they miss almost 1/2 the time and 1 dodge means that unit has wasted its activation.
Kromac1 in particular can shut down madrack 1 with bestial and Fixes Mat With Wild aggression. A Stalker with Wild aggression and wraithbane will murder champs, as will ghetorix. Who can also warp murderous to be Mega Accurate.
It’s a hard fight for sure, but I think you actually can make it work. Mat 8-9 with guided hand and high pow/Weaponmaster is really hard on our living beasts though. Honestly, my biggest issue with my living beasts and def skew in general is that it’s easier to circumvent. Unless you are Def 16+ There are a good number of lists that can reliably deal with you. Mat 7 with a standard mat fixer will normally ruin Def 14/15. Trolls are just one of this factions that can easily get thier infantry around Def skew.
If you keep having issues with living beasts maybe try switching over to Bones to see how that plays out. Kromac 1 can threaten madrack and plays a really awesome game with warpath and wolds. Finding ways to trigger warpath can be hard but long Riders or Solo scalpling could work. Kromac 1 also plays well into other lists as well in Bones. Krueger 2 can just really put lots of pressure on madrack 1. He has a really gross assasination threat and he can use the Feat and TK to hinder champs or move them out of B2B and turning them around, making them Def 10 effectiveley.