Beastmaster + Tidehunter

Why this works

Stacking two big teamfight initiators often creates a resource problem. Both Beastmaster and Tidehunter want to be the frontline hero who buys a Blink Dagger and controlling auras for the team. When they're on the same side, they compete for the same farm priority and role. While chaining Primal Roar and Ravage sounds powerful, it can be redundant. A single big initiation is usually enough to set up a fight, so the second ultimate doesn't provide as much value as a different type of ability, like sustained damage or a strong save, might have.

This dynamic forces one hero into a less comfortable position from the start, slowing down the key items the whole team is relying on. The mid-game can feel clunky, as you might have two half-ready initiators instead of one fully-equipped one. An enemy team can exploit this timing window to secure map control. If your team can survive this awkward phase and both Tidehunter and Beastmaster get their core items, their combined control can eventually secure a teamfight. It's a workable plan, but it creates an unnecessary hurdle for your team to overcome.