Urgot Support with Lethality Teams
If you want to rule the world, go Urgot Support when your team is full lethality AD.
Alternate items: 
Masteries: 12/0/18 (Stoneborn Pact) Runes: Defensive for tanking
What does this give you?
- 48% armor reduction on anyone hit by E (which fully stacks cleaver by itself and provides 20% armor reduction)
- 15% damage reduction debuff on probably their entire team if you are careful with positioning your AAs and poking with your Q from your passive
- Lots of life which translates to a very healthy heal for your passive (which you can still apply with W+Q, R, and FotM active until you get frozen mallet)
- Decent damage output
With this setup, your lethality-using teammates will completely shred the enemy team, regardless of their armor. If someone has 200 armor, they will have only 104 vs your team. It's that simple. Squishy targets will likely be taking increased damage from physical attacks, all while you are giving your team 15% effective damage reduction in team fights from smart use of your passive.
