While it may seem like a no-brainer that a lifegain deck has a ton of internal synergy, the actual payoffs and lifegain sources you choose can greatly influence your decks overall effectiveness
Add in all of the Instants and Sorceries that make Squirrel tokens, the few creatures that do that which I cut and Coat of Arms and you've got a decent start
Utility creatures, offensive creatures, defensive spells, disruption tools, and facilitator spells are the most common playable one-mana options
Token-based Commander decks can follow a number of paths, all depending on the commander you pick
Still, there are a lot of random ways to gain life and give Minwu the first couple of counters, so that might not be much of an issue
Ahead of the new set, Dicebreaker can reveal one of Into the Inklands rarest Enchanted cards debuting on February 23rd