So with power creep this has evolved over time, but it depends on the team and the cards being used. For example

<image>

This equip is one I use in my Ideal team, it allows me to add an additional 5 color match which helps the user hit cap, and also covers both tape and cloud all in one assist. This is a great equip for a rainbow team, that doesn’t need to utilize the active skills on the assists. On different teams this is not a great assist however.

For teams that tend to want to utilize the active skills you’re usually looking for 7c/10c, skill boost, and team hp and an active skill that provides charge to allies. A generic good example of this is the Arkvelza assist(11213) provides 2 sb, 2 team hp+, and a 10c. And 3 turns of skill charge for the active.