What strategies help a slow, heavy build beat Malenia's phase two?

[Richard34]

I'm stuck on Malenia, Blade of Miquella in Elden Ring, and despite dozens of attempts, I can't seem to get past her second phase. I'm playing a strength build with a Colossal Greatsword, which feels too slow to punish her openings without getting caught in her waterfowl dance. Before I completely respec my character, I'm looking for a boss guide tailored to slower, heavy-hitting builds. What specific strategies, weapon arts, or consumables did other strength users find effective for staggering her and surviving her most aggressive combos?