Legion Commander new aghanim's scepter makes her W an ultimate-tier ability.
It's a massive AOE, move speed buff + heal + STRONG DISPEL, that always casts on yourself. It also casts automatically around you after duel and you can manually cast during duel.
You can completely counter spells like RP even if you are dueling someone.
The issue with LC, is that you often build for duel, to ensure a kill. So spending 4.2k for utility feels kinda weird. But I think Valve is trying to go in another direction. Last patch, it made sense to go all-in on duel with the Aghs, shard and facet all buffing it.
But now, if you fail to ramp up with some early duels and don't have a bursty gank partner, you are mostly useless midgame. Blinking in, dueling and feeding.
And there is where the Aghs shines. You can shift from a duel-centric build to a utility focused one, where your goal is to sustain your team and use duel as a long stun, not to always win it, but to survive it.