Hello,
This combination won't work in your condition as you at retreated a s acne but we need to rule out other skin conditions as well because you can't have same spots at same place for last 5 years and pimples aka acne supposed to be graded
Detail history along with photographs are must
Next Steps
Consult me online for more information and this combination won't work and you might end up with other complications because of irrational treatment
Health Tips
Use a non comedogenic moisturiser as your dullness is mainly because tretin clauses dryness and irritation
Consult me on practo for further details