As of the helmet, legs and boots I recommend using Terra Helmet, Fabulous Legs and Depth Calcei for every of the Pharaohs. If using a one-handed weapon Gnome Shield is also recommended to be in shield slot.
Ashmunrah: Hits pretty hard with Physical Attacks, beside that, casting Life Drain Wave and deals Death Damage.
Recommendation: Gill Necklace, Ornate Chest Plate, Bone FiddleRing of Souls and a FIRE ELEMENT WEAPON.
Dipthrah: Mostly focused around Life Drain and Mana Drain. As an EK I'd prefer keep my mana high thus I'd go for anti-mana drain EQ.
Recommendation: Bronze Amulet, Ornate Chest Plate, Starlight Vial, Ring of Souls and an ICE ELEMENT WEAPON.
Mahrdis: Really powerful Physical Attacks as well as really high Fire Damage.
Recommendation: Magma Amulet, Fireheart Cuirass for Sword users (note: if you chose different kind of weapon you should buy different kind of armor (+weapon skill) but of the same type (+fire resist). Purchasable from Cledwyn for 100 Silver Tokens), Sun Catcher, Enchanted Blister Ring and an ICE ELEMENT WEAPON.
Morguthis: Mostly using Physical Attacks as well as Death Damage.
Recommendation: Gill Necklace, Ornate Chest Plate, Moon Mirror, Butterfly Ring and an EARTH ELEMENT WEAPON.
Omruc: Using Physical Attacks as well as Fire and Earth Damage. This boss is quite weak.
Recommendation: Gill Necklace, Ornate Chest Plate, Sun Catcher, Enchanted Blister Ring and an ICE OR ENERGY ELEMENT WEAPON.
Rahemos: This one focuses his damage around Physical, Death, Energy and Life Drain what makes him quite difficult opponent.
Recommendation: Prismatic Necklace, Thunderheart Cuirass for Sword users (note: if you chose different kind of weapon you should buy different kind of armor (+weapon skill) but of the same type (+fire resist). Purchasable from Cledwyn for 100 Silver Tokens), Bone Fiddle, Prismatic Ring and a PHYSICAL DAMAGE WEAPON.
Thalas: Heavy Physical Attacks and high Earth Damage.
Recommendation: Exotic Amulet,Earthheart Cuirass for Sword users (note: if you chose different kind of weapon you should buy different kind of armor (+weapon skill) but of the same type (+fire resist). Purchasable from Cledwyn for 100 Silver Tokens), Bone Fiddle, Ring of Souls and an ICE OR FIRE ELEMENT WEAPON.
Vashresamun: Her Physical Attacks aren't that strong so it's best to focus around Death Resistance and prepare for Life Drain.
Recommendation: Necklace of the Deep, Ornate Chest Plate, Moon Mirror, Butterfly Ring and a PHYSICAL DAMAGE WEAPON.
I hope these tips will be useful to all of you in the future and maximize your grind rate.