Just a FYI, but the new HoN wiki, at www.heroesofnewerth-wiki.com now has hundreds of guides, many of them from this forum. We have credited and sourced all guides, and we are always looking for new ones.
Please let us know if you want to post your guide with us, as we'd be happy to review it. Email me at firstname.lastname@example.org or msg me here
If possible, I'd suggest making it the direct "Engineer" link as the first 3 are completely outdated and the fourth one is pretty sparse atm. Would probably help to just take those first three off in general.