Yeah sure, urgot has less than 1% Pick rate right now across all servers in ranked and casual but that just means no one knows how his skills work or how to counter him.

I've almost gotten 2 pentas now because no one aims for urgot first in a teamfight, moreso if you're the support. Their mistake. Late game your Acid Hunter does 130 + 85%AD per second, and reduce the damage of those it hits by 15%.

Terror Capacitor shields for 60 / 100 / 140 / 180 / 220 (+ 8% maximum mana). I didn't include the AP scaling because you shouldn't have any AP. But it's +80% of your AP.

Noxian Corrosive Charge does PHYSICAL DAMAGE PER SECOND: 15 / 26 / 37 / 48 / 59 (+ 12% bonus AD), or TOTAL PHYSICAL DAMAGE: 75 / 130 / 185 / 240 / 295 (+ 60% bonus AD), and reduces 12 / 14 / 16 / 18 / 20% of target's armor. This also procs Black Cleaver and Deathfire Touch .

Most consider him a troll pick but fug them.

I generally prefer urgot adc since he is tankier than most others and still allows him to go full damage. If playing support or top more items go towards tankiness and utility.

Thanks to the Ancient Coin buff in 7.13, Not only does it give 40 gold after upgrading to nomad medallion (which is a crazy amount btw) it also drops % MANA. The one thing urgot needs most, and it now drops from creeps. This means free tear charge, free harass, and more sustainability.

Most other supports can't even deal with you. Other than lets say thresh or leona, tanks that have engage. He counters almost every poke support, heal support ( Soraka, Sona, Zyra) etc. And forces ADCs out of lane. Take Ignite to counter their heal and lifesteal, doing damage as well. Take exhaust for champions with burst to keep your ADC alive. (e.g. Zed, Fizz, Gangplank)

When it comes to final support item between Talisman of Ascension or Eye of the Oasis I normally go for talisman. It gives armour, movement speed near towers and its active lets your team engage or disengage if caught or catching someone.

Take Teleport for top,

Exhaust or ignite for support,

Heal for ADC.

Always take flash for surprise engage and escape. Urgot has 0 mobility abilities and can also use flash to flash-ulti someone into your team i.e. the enemy team carry.