Rsa didnt have ATG bats, but they had a bunch that were very good in their batting positions. In the mid 90s, the top was weak, but they got a few new bats around 96 and some of the older ones got better. By 99, the the whole top order was quality (except Cullinan), even if nobody was ATG level. And they had Boucher, Klusenar, Pollock from 7-9, or occasionally an even stronger lower order when not playing Elworthy.
Rsa absolutely did have ATGs in the side though. Pollock, kallis, klusenar and donald unquestionably ATGs. 4 in a side (around their peak) is a big number. Maybe Aus topped this sometime in the early 2000s, but I doubt another team has.
Team had some issues, but the klusenar reliance is more a result of underperformance than paper weakness.