Bristleback + Ursa

Why this works

Stacking up physical damage dealers often makes the enemy's item choices too easy. Both Bristleback and Ursa want to run at targets and overwhelm them with sustained physical attacks, but they create a one-dimensional threat. Enemies can buy armor items, Ghost Scepters, or Heaven's Halberd and get full value against both of your cores. The duo also lacks hard lockdown. Bristleback's Goo and Ursa's Earthshock provide slows, but this isn't enough to hold down mobile heroes who can simply kite your two melee front-liners. You end up with two heroes trying to do the same job without effectively helping each other land their damage.

This forces the rest of your draft into a corner. Your other heroes must provide all the stuns, catch, and magic damage, which can be a tall order. While taking an early Roshan is a clear strength of this pair, the overall game plan becomes very predictable. The enemy team knows you want to group up and brawl. If they pick heroes with good saves, strong kiting abilities like Winter's Curse, or high mobility, they can often dictate the fights. This leaves Ursa and Bristleback unable to connect with key targets, even when they're strong.