Battlemaster Fighter tactics in a mostly ranged party

[Darc_Vader]

If you’re looking to keep enemies off your allies, then you should look to either Menacing or Goading attack imo. Goading will incentivize them to attack you instead of the squishies, and Menacing allows you to keep dangerous melee enemies away from you and/or your party members depending on positioning. Both also work well with a bow if needed: Goading becomes a blanket disadvantage on attacks if they can’t get to you, and Menacing just straight up denies a significant portion of the battlefield to the target (along with its own blanket disadvantage effect) until they can break line of sight.

Edit: as for general healing and survivability, maybe have someone look into taking the Healer feat; turn healer’s kits from a stabilizer to a better stabilizer + reusable potion.

Re-edit: The Ranger also has access to the spell Healing Spirit at level 5, which is widely considered to be brokenly strong, and even if it is limited to in combat, is still pretty good provided the concentration isn't being used elsewhere.