It's strong everywhere, but it has enhanced value in archetypes that care about counters generally, +1/+1 counters specifically, proliferate tricks for multicolor brews looking to add loyalty counters for their planeswalkers, four and five-color decks, Commanders with evasion, Commanders with a power that, when increased by 1 get a faster kill, Equipment, Aura, and Voltron decks looking to get in kills with their Commander, and loads more
That said, those that are, will likely all want copies of cards like Lithoform Engine and Strionic Resonator
And many monsters in recent sets have had it as one of their powers
Cadaverous Bloom Why play fair when you don't have to
Maybe getting at pips would be a good way to getting a better look at how players are using the color pie (note to self: do this and add it)
Grim Monolith Next up is Grim Monolith