Understood. I think the repository suggestion was speaking more to the issue of it being a "pain to compile PHP". As you've pointed out, though, it doesn't solve the matching PHP part of that issue.
(I would be interested to see, though, if this command from our newly updated repository doesn't go a long way towards solving that second part of the issue: yum install lsphp55-* --skip-broken
Documentation on the repository can be found here: http://www.litespeedtech.com/support/wiki/doku.php?id=litespeed_wiki:php:rpm
Really enjoying this feedback, by the way. We'll try to get our look into Interworx soon.