Ideally you want five or six one drop threats and as far as I can count there are only seven good or on theme ones including Grim Lavamancer which isn't so much on the proactive side
Many of the cards in the deck deal with adding these counters, plus plenty of +1/+1 counters to your creatures, so you can bet that there are tons of ways to proliferate all your counters up to even higher levels and to keep your opponents constantly losing life through either combat or radiation
If you are brewing HashatonHashaton, however, this thing is a slam dunk
Opponents and creators of party decks should be aware of these interactions
In a slugfest against other precons, Animated Army will typically come out on top, hitting surprisingly fast and hard
With a slew of strengths, including infinite-mill potential and absurd stats for its cost, The Ancient Ones few limitations are well worth working around