The fact lotus doesn't stop Ronin any more is a bit of a problem...

Use attack move kodachis or Minotaurs to keep the Ronin in place and then emissary or Stinger them?

Though I expect vs cloak you just need to spam kodachi (tank's only good unit) and rely on manoeuvrer to ensure that ronin spam loses (you go around and wreck their eco) until the density is enough that you can do get air or firewalker or a critical mass of emissary.

What do you mean by "hardcounter"?
Like, the same cost in skirms attacking a stinger in line formation?