Even if we try to reduce some repetition when a style is repeated, we now have a more complicated picture of what is going where. Modules and extending those modules gives a clearer representation of what is going on. It also makes it easier to trace through the styles for editing. This gist represents an attempt at cutting down style repetition.

Hard to follow

.accordion-super h1,
.faq h2.question {
    color: blue;
}

.accordion-super h1,
.archive h4 {
    font-family: serif;
}

.accordion-super h1 {
    font-size: 20px;
}

.faq h2.question {
    font-size: 18px;
}

.archive h4 {
    color: green;
    font-size: 14px;
}