This build is damage and health build its ofcourse beast in late game but be carefull in early game . (This is my first build so dont judge me too hard)

My rune build is for damage and physical,magic resistance . I think its good because in late game u are BEAST u have 150 physical 110 magic resistance and bonus AD.

I build masteries main on offense for great AD . Little defense for some extra armor and magic resistance. And ofcourse utility for less time beeing respawned and faster recall

At the very start i pickup boots of speed for hecarim passive , 2 health potions , and 1 mana for extra time on lane. I recall when i have enough gold for boots of swiftness and phage.
I recall second time to take whole trinity force for extra movement speed (+ AD passive), and sheens passive( +extra mana and AP) . Then i pickup hextex revolver for spellvamp with Q and giants belt for HP . For next recall i take whole hextex gunblade for extra AD AP lifsteal and spellvamp . Then i buy warmong for max hp . Then u have to look for your situation u can take maw of malmortius if the enemy team has more AP or Atma's Impaler if they have more AD but anyways u buy them both

First u have to max Q first its your main skill cuz u have to spam it . Second skill u have to max is W for extra health steal it gives you more survivability . Third skill u max is E u take it on level 2 cuz all u need from it is movement speed then u max it last. And take R everytime u can cuz its your ultimate .

Ignite is good for those who life steal or spellvamp so its a must have . Ghost is good for Hecarim because he can combine it with E to do a LOTS of damage (passive)

I think Hecarim is a great Champion but u need skill to play it too . GL HF