A question?

This tactic is called butterfly?

dc-dc-dc
dcm-dcm
mc-mc
amc-amc
st

No that tactic is called an illegal formation

Move DMC to DML and DMR.
Move AMC to AML and AMR

Then it will be a butterfly

ok, thank very much,

I want to use this tactic against 3-5-2 flat

dc-dc-dc
mr-mc-mc-mc-ml
st-st