It’ m interesting build!
From a summoner’s perspective though I wouldn’t use it for a few reasons.
I considered the cleansing aura , only problem being the ennemy will simply re-cast the curse immediately so it doesn’t help all that much. It could be helpful if the main source of dmg came from a melee char build fighting alongside my summons though. If I built my char like that then plague would be good.
Another thing is if I want to fully benefit from plague I would need to build around it so to speak. Things like lower resist for example would benefit from non physical types of dmg but physical is the main source of dmg a summon druid deals.
That leads me to my other point . The rabies and poison creeper investment instead of ravens make this a rabies druid rather than a summoner. Don’t get me wrong rabies druid is a perfectly fine build but it’s not a sumonner druid.
I also use bramble for the thorns aura but I’m very realistic about the amount of dmg it deals. I got it hoping blizzard would actually fix the aura eventually. The main reason most people get bramble however is for the increased poison damage which again goes back to it being optimal for a rabies druid or a poison necro.
Heart of wolverine realy depends on playstyle but I prefer survivability since my summons are already boosted by synergies and 3 other different sources : might aura - concentration aura from Pride runeword on merc- amp damage.
All this to say your build actually seems pretty
fun it’ just not a sumoner which is what I like to play as