I’m using a common .title class for all the absolute postioned background text and then four separate modifying classes to position each title at the four corners of the page. Here’s some of the sample code:

.title {
  font-size: 100px;
  position: absolute;
}

.title--top-right {
  right: -10%;
  top: 15%;
  transform: rotate(90deg);
}

.title--bottom-right {
  right: 5%;
  bottom: 2%;
  transform: rotate(180deg);
}