We discussed this in the shoutbox, but it's glitch abuse not game mechanics. To use a below-leech level character with HS and receive more than 110% exp from something is clearly not how the game is supposed to work. With HS you are supposed to receive 110% exp without any other characters in party that are leech level or above. With at least one character that is leech level you receive 150% exp with HS. To circumvent the leech-level requirement is to glitch abuse, and a statement isn't needed because it's fairly common sense. If you know of others who are using this method you are free to report them anonymously in PM if you wish.