Heya Lukin,
In his case, the goal is primarily to make as many tokens as you can and then convert them into something bigger and scarier by creating a token copy of something you care about more.
Ex. 20 assorted tokens of Myrs, Golem, and Thopters. Create a token copy of
Master of Etherium. Suddenly you have 21 creatures that are 41/41s, have haste, and a very beefed up Brudiclad.
If you have
Mycosynth Golem out, a
Vedalken Archmage or Jhoira, and a handful of artifacts, you have the potential to play out a good chunk of cards in the deck to build up a quick board state. and get some of the scarier artifacts onto the board.
As you've mentioned,
Mirrodin Besieged is an alternative win condition.
TLDR: I told my friends that this deck filled with Myr was a Token Myr Deck, they now make fun of me because I won using Golems.