I started playing him in SR and I really like him but I mostly play dominion so I was wondering if anybody could give me some good builds for him or tips. I figure he's a good ganker for bot lane so maybe boots of mobility will work and iceborn gauntlet but I'm not sure if black cleaver is a good idea for him or if I should go for a more tanky build after that.

Thanks for help.

Get visage, an armor item (frozen fist, locket, lantern), and either cleaver if your team has AD champions or whisper + youmuu for yourself.

Build them in an order that makes sense for the game, for example going brut + kindlegem + glacial gives a really solid general increase while rushing a completed defensive item against an AD or AP team works really well.

Do not be a bad pony and rush trinity force. We look down upon those types around here.

Frozen Heart is also a good choice on hecarim.

Core is Visage + FF + Boots (cdr or mercs or tabi as needed). From there it's situational damage/tanky items. If you want damage look at a BC, Atmas (lategame once you have health), or Youmuus. Look for Locket, Randuins, or Aegis for tanky.

Hecarim is best paired with a strong damage dealer like Vi, Vayne, etc. ~29% AoE everythingsteal will keep you alive for so long it's not even funny.

I usually go Spirit Visage, Iceborn Gauntlet/Frozen Heart as my core when I play Hecarim, giving me 40% CDR as early as possible and build around the enemy for later game items. (Frozen Heart/Iceborn Gauntlet, Last Whisper, Atma's Impaler, Frozen Mallet, so on.) Boots really depend on personal preference and enemy team make up.

I go 9/17/4 in masteries.

Runes: 3 Quints of Move speed, 8 Scaling armor seals, 1 CDR seal, 9 CDR glyphs, and 9 scaling phys dmg marks. Giving 4.5% move speed(6.5% with masteries), 6.18% CDR (10.18% with masteries), 22 phys dmg at level 18(34 wiith masteries), and 22 armor at lvl 18.

And that's the way I roll with Hecarim. Hope it helps.

Thank you all so much. With your help I'll go get my blue ribbons.