I use the following and they are all sustainable.
Here are the characters that I usually play the most, maybe it will help:
STR Shielder
Normal Outfit: 28,578
Winged Great Helm
Heraldic Mail with Tabard
Mail Mittens
Mail Chausses
Arabian Cavalry Sword
Knightly Heater Shield
X3-X5 Multiplier Outfit: 50,876
Winged Great Helm
Heraldric Transitional Armour
Gilded Hourglass Gauntlets
Shynbaulds
Arabian Cavalry Sword
Heavy Heater Shield
AGI 2Her 18,566
Rabati
Blue Mail with Surcoat
Mail Mittens
Sarranid Mail Boots
Two handed Sword
Lancer ranges in mood from 22,998 with Rouncey to about 40,000 depending on my mood. Dismounted is about 15,000. Always dismounted on non friendly cav maps.
1Her Cav 50,000 mounted (give or take 10K depending on mood), 28,000 dismounted (always dismounted unless it is a perfect cav map)
Tank Shielder 35,600
Klappvisier
Rus Scale Armor
Mail Mittens
Rus Splinted Greaves
Military Cleaver
Huscarl's Round Shield
Balanced Archer 12,191
Felt Cap
Tribal Warrior Outfit
Leather Gloves
Wrapping Boots
Rus Bow
Wooden Stick
2x Arrows
Polearm 40,320
Barbutte
Black Coat of Plates
Wisby Gauntlets
Light Strange Greaves
Poleaxe
STR 2Her 37,194
Great Helm with Hat
Heraldic Transitional Armour
Wisby Gauntlets
Light Strange Greaves
Heavy Bastard Sword
AGI Archer 24,102
Black Lamellar Vest
Leather Gloves
Kergit Leather Boots
Tatar Bow
Mace
2X Bodkin Arrows