Sniper + Templar Assassin

Why this works

Trying to secure farm for two cores like this is a nightmare. Both Sniper and Templar Assassin are greedy physical damage dealers who want the safest parts of the map to themselves. They hit similar item timings and often build similar damage items. The core problem is that neither hero offers the control or frontline presence the other desperately needs. Sniper can't stand in front to let Templar Assassin hit people, and TA's toolkit doesn't do much to peel divers off a backline Sniper. They end up as two glass cannons standing next to each other, waiting for someone else to start the fight.

This leaves the team incredibly vulnerable, especially in the mid-game. Enemies can easily run at either core, knowing there's very little lockdown to stop them. A successful gank on one hero cripples the farm of both, as the map shrinks and the remaining core has nowhere safe to be. The team is forced into a passive, defensive posture, which is the opposite of what a hero like Templar Assassin wants. Your game plan becomes about surviving their aggression rather than executing your own, and with two high-priority targets, it's often impossible to protect both at once.