Struggling to keep vowel harmony consistent when adding multiple suffixes

I’m an intermediate learner and I can read articles okay, but the moment I try to construct a complex sentence, I freeze trying to calculate the vowel harmony for the fourth or fifth suffix in a row. Is there a mental trick or a specific drill that helps you 'hear' the correct vowel transition automatically without having to pause and analyze every syllable? I am asking specifically about learning Turkish, not a generic study routine.