My Skill Issue cannot manage to beat >!Moorwing!<, and I was stuck there for two days now. I need help with the strategy.

I am pretty sure that I have maximum equipment possible at this point, but in case I missed anything, here is the list:

Red tools - Straight pin, Spike trap.

Blue tools - Druid's tear, Bell of protection? I don't remember the name correctly.

Crests - Hunter, Reaper.

Masks - 5.

Silk - starting amount.

Abilities - Silk Spear, Swift Step, Drifter's cloak, 1 silk heart.

Incomplete upgrades - 2/4 mask shards, didn't buy the one in Bonebottom; 1/2 silk pool fragment.