The pieces of equipment I would recommend for this achievement would be:
Ascender - Paititi Merchant
This can be purchased from a merchant that is unlocked after the completing the side quest for finding Takiy's Dice within the Hidden City. The end of this side mission unlocks a special vendor that sells this for 3,300 gold pieces. This equipment is used to take down heavy barriers.
Lockpick - Paititi Merchant
The merchant that sells the Ascender listed above also sells the Lockpick for 2,800 gold pieces. The lockpick allows you to open conquistador treasures, and is required for another achievement.
Quiver Options - Paititi Male Merchant