Glissa should see Strix. When State-Based Effects are checked, both creatures die at the same time from lethal combat damage. Triggers go on the stack after. At that point Strix is already in the yard to target.
Glissa could also recur SB hate cards like
Nihil Spellbomb to grind out Dredge and
Tropical Island.dec
Good results! So you're consistently beating the top tier fair decks, but losing to combo decks. Maybe that could be fixed with some SB adjustments. Borrower would help vs Depths.
Yeah, Chevill might be too conditional. Unless it's reliably triggering twice it's probably worse than Strix and Coatl (Also 1-power deathtouch, but flies and draws the card right away). Every time it does nothing or even just triggers once (delayed cantrip), it's not doing enough.
Fynn + 8Strix could be a good way to speed up the clock. Then again, Fynn will draw removal like Chevill and if it doesn't survive long enough to get 10 poison counters then it accomplished nothing. Worth testing but may not be consistent enough. Glissa could be another value engine, but might be too conditional like Chevill. Another option could be to just maindeck 2 Plague Engineers in that spot, freeing up SB space for combo.