What's the word on wolf?

[Discpsycho]

I'm considering doing my last PDK life as a Silvanus druid, since I've got a Drow Maul on hand, but I haven't been able to find good info on what's stacking

Tentative plan:
8 Druid / 6 Fighter / 6 Cleric
Feats (7 + PDK + 4xFighter): PA/C/GC, NFx3, IC, Completionist, three others TBD
Stats: 18 Str, 16 Con, 16 Cha

Questions:
- Does Stalwart Defender stack with Nature's Protector? I would love to forgo EDF and toss out heals on the fly
- Do any combat style feats work in Winter Wolf?

[Emerge2012]

Stances don't stack and only Natural Fighting feats work in animal form.