Goblin King, Goblin Warchief, and Goblin Chieftain are also staples, as haste and cost reduction are both invaluable things to have
The problem is that since the Geist is so small stat-wise, it is pretty easy to take him out, even with the hexproof
Soulless Jailers 0/4 stat line means that it can even survive Lightning Bolt while also giving it a fair chance to survive when it swings to get that trigger for Winota, Joiner of Forces in cEDH
If that's not enough, it pairs extremely will with the other best Green card in Standard, as Badgermole Cub can provide even more mana with Formidable Speaker
Being both gold and basically always needing a dork in play to do much of much leaves this with not all that many decks that can play it
I haven't written many top 10 lists, but I've been meaning to do it more often