
Sets You Can Complete on a Mercenary: Isenhart's Armory (Act III), Szabi's Grand Tribute (Act III or V).Good Midlevel Caster Sets: Naj's Ancient Visage, Tal'Rasha's Wrappings.Good Midlevel Physical Damage Sets: Immortal Kings, Orphan's Call.Low Level (Leveling) Sets: Angelic Rainment, Death's Disguise, Sigon's Complete Steel.For the most part, sets in D2:R with the expansion turned on are never going to compete with Runewords, but here are some good sets:
TOY DEFENSE 2 LEVEL 60 FULL
While many sets have individual pieces that people love and are even Best in Slot (BiS) for some classes and builds, there are some sets that are very strong as full or nearly-full sets. Not all sets have Specific Item Partial Set Bonuses, such as the Cow King's Leathers or Sander's Folly.

(If you then added the Cathan's Sigil amulet, that would credit you with having two different items from the set and you would then receive the general 2-piece Partial Set Bonus). However, you will not get the setwide Partial Bonus because that only applies to different items.
TOY DEFENSE 2 LEVEL 60 PLUS
If you are wearing two Cathan's Seals, you will have 12% Life Leech from the core properties, plus +20 Strength from the 2-item Specific Item Bonus being applied by each item.

The setwide Partial Item Bonus is +15-20% Fire Damage, and the Specific Item Bonus for 2 items is +10 Strength. For example, the set Cathan's Traps has a ring called Cathan's Seal, with 6% life leech. However, if the set has a Ring, you can wear two copies of the set ring and it will give you the Specific Item Set Bonuses. In sets with similar items, such as the two-sword set Bul'Kathos Children or a set with a ring such as Angelic Raiment, you cannot wear duplicates of the same item to get the partial or full set bonuses that apply to the entire set.

This can create a very impressive list of properties! Once you have a full set, you retain all Partial Set bonuses in addition to the new Full Set bonuses. Specific Item Partial Bonuses are added in green text to the individual set items involved. General Partial Set and Full Set bonuses are listed at the end of each set. However, if one of those two items is the Arctic Binding Light Belt, the Specific Partial Set bonus also adds 40% better chance of getting magic items. For example, in the Arctic Furs set, the general Partial Set bonus for 2 items is +5 Strength. A Specific Item partial bonus is added if that combination includes a specific item from that set.

Some are targeted at specific classes or roles. This describes items that work together as groups of gear, nearly all named after an iconic figure in Diablo's lore. Welcome to Wowhead's guide to Gear Sets in Diablo II: Resurrected.
