Thread:85.138.248.47/@comment-25173123-20140906093944

Most people read the abbreviation HP as Health Point vs spelling out H and P. In the latter you would use "an" but when abbreviation is normally read as the words themselves then you follow the rule of silent versus voiced. Thus "a" would be used in such cases where word is normally voiced out when seeing/reading said abbreviation.

If you think I am in error with the thought of voiced versus non-voiced when using this "HP" abbreviation then simply change the abbreviation to instead read "health". Thus also making it in line with other words that you did not abbreviate. (damage and resistance boost) 