this is a build i have discovered through my cousin that told me that all he builds on heimer is warmogs over and over, i tried it and love it so much i had to refine it to where it fits in with all the great builds in this world, plz try this out before judging (not recomended for ranked games)

This build works best as a solotop laning against an opponent without much harassment power, plenty of farm is needed for items

being a heimerdinger you have a unusaly large health pool for a mage and your passive does provide extra healing and lane sustanibility. also being a heimerdinger you are the one who is seen as the squishy mage that can be focus'd quickly and towwer dived in hopes of a quick oneshot and run, but with this at 1/3 health you have equal health to the usual magedinger.

i say build heimer like a regular tank in the masteries section, nutin much else to say

Runes are pretty much all in the defenceive way to make you more of a viable tank and all stages of the game

your job in a team is similar to the usual heimer build (blind/stun, lay down turrets for support) but you also become the target for the enemy team to focus and you live to let your team do more damage then you would have done as regular unfed heimer.

Exhaust and flash are taken for:
Exhasut: great spell for helping support your team by debuffing and basicly rendering one enemy useless in a teamfight
Flash: you all should know hwo good flash is no need for real explination

pros:
trick enemys to missread your health
get focus'd while team has time to do their thing
blinds of win
tank people with your EPIC FRO
cons
not as much dmg as say AP heimer
your team may yell at you if your not owning (which u should be)

i cant stress this enough if you are a person that doesnt like teamates insulting them then reconsider trying this build in much places.
until you prove your worth to your team you will most likely be raged at by every1 on your team.
if you can earn your keep then you will be golden to tank/troll with having some epic viability in all team fights