Mercenaries

Merchants hire out their region's kind of mercenary (Broken Avalon: the floor's region), one per variant, a few levels below you, for account gold. Only one at a time. It fights on your side, turn by turn, with its skills and its aura: mercenaries are the only ones with auras. When it dies it is gone for good.

Gear: helm, body armor, gloves, boots, belt and a weapon of its kind (plus a shield for some). Never rings or amulets.
Stats: only Strength and Dexterity (to meet requirements); life, defense, damage and resistances come from its level. Vitality and Energy on its gear do nothing.
Skills and aura grow with its level; +all skills on its gear raises every one of them.
Set bonuses work on it.
It uses the same attack speed breakpoints whatever the weapon, and your Magic Find and Gold Find apply to what it kills.
Experience: it gains 50% of the experience you earn from kills, and never levels past you.
Death: it is gone for good, with its gear (no reviving in a run).
Your bonuses to it: Life / Damage / All Resistances for your Mercenary on your hero (the Bard's Annwn passives, mostly) are added to it at the start of every battle. Songs and other buffs on your side reach it too.

Scout (Burned Broceliande)

Weapons: bow. Helms: helm.

Variant	Skills at 10	Skills at 30	Skills at 50	Skills at 70	Skills at 90
Fire	Vow of the Pilgrim 2 Burning Arrow 2	Vow of the Pilgrim 6 Burning Arrow 6	Vow of the Pilgrim 9 Burning Arrow 10	Vow of the Pilgrim 13 Burning Arrow 14	Vow of the Pilgrim 17 Burning Arrow 18
Cold	Vow of Stillness 2 Frostbitten Arrow 2	Vow of Stillness 6 Frostbitten Arrow 6	Vow of Stillness 9 Frostbitten Arrow 10	Vow of Stillness 13 Frostbitten Arrow 14	Vow of Stillness 17 Frostbitten Arrow 18
Physical	Spirit Arrow 2 Arrow Storm 2	Spirit Arrow 6 Arrow Storm 5	Spirit Arrow 10 Arrow Storm 8	Spirit Arrow 14 Arrow Storm 11	Spirit Arrow 18 Arrow Storm 14

Level	Life	Defense	Str	Dex	Damage (+ weapon)	Resistances
10	207	138	45	61	4-7	7%
30	579	430	70	101	11-16	22%
50	951	722	95	141	18-25	37%
70	1323	1014	120	181	25-34	52%
90	1695	1306	145	221	32-43	67%

Templar (The Fens of Avalon)

Weapons: spear, javelin. Helms: helm. One-handed weapons deal double damage.

Variant	Skills at 10	Skills at 30	Skills at 50	Skills at 70	Skills at 90
Defensive	Vow of Iron 2 Quick Thrust 2	Vow of Iron 6 Quick Thrust 6	Vow of Iron 9 Quick Thrust 10	Vow of Iron 13 Quick Thrust 14	Vow of Iron 17 Quick Thrust 18
Offensive	Oath of the Keen Eye 2 Quick Thrust 2	Oath of the Keen Eye 6 Quick Thrust 6	Oath of the Keen Eye 9 Quick Thrust 10	Oath of the Keen Eye 13 Quick Thrust 14	Oath of the Keen Eye 17 Quick Thrust 18
Combat	Oath of Thorns 2 Quick Thrust 2	Oath of Thorns 6 Quick Thrust 6	Oath of Thorns 9 Quick Thrust 10	Oath of Thorns 13 Quick Thrust 14	Oath of Thorns 17 Quick Thrust 18

Level	Life	Defense	Str	Dex	Damage (+ weapon)	Resistances
10	225	154	54	42	8-13	7%
30	625	474	86	68	19-28	22%
50	1025	794	118	94	30-43	37%
70	1425	1114	150	120	41-58	52%
90	1825	1434	182	146	52-73	67%

Adept (The Cornish Coast)

Weapons: sword, wand, mace, wizard orb. Helms: helm. Shields (including Paladin shields). One-handed weapons only. Never blocks, even with a shield.

Variant	Skills at 10	Skills at 30	Skills at 50	Skills at 70	Skills at 90
Fire	Vow of Purity 2 Falling Star 2	Vow of Purity 6 Falling Star 6	Vow of Purity 9 Falling Star 10	Vow of Purity 13 Falling Star 14	Vow of Purity 17 Falling Star 18
Cold	Vow of Mending 2 Deep Winter 2	Vow of Mending 6 Deep Winter 6	Vow of Mending 9 Deep Winter 10	Vow of Mending 13 Deep Winter 14	Vow of Mending 17 Deep Winter 18
Lightning	Oath of Storms 2 Storm's Toll 2	Oath of Storms 6 Storm's Toll 5	Oath of Storms 9 Storm's Toll 8	Oath of Storms 13 Storm's Toll 11	Oath of Storms 17 Storm's Toll 14

Level	Life	Defense	Str	Dex	Damage (+ weapon)	Resistances
10	179	113	41	41	5-8	7%
30	499	353	65	65	11-16	23%
50	819	593	89	89	17-24	39%
70	1139	833	113	113	23-32	55%
90	1459	1073	137	137	29-40	71%

Ascendant (The Wasteland)

Weapons: staff. Helms: helm.

Variant	Skills at 10	Skills at 30	Skills at 50	Skills at 70	Skills at 90
Dark	Mark of Frailty 2 Bone Lance 2	Mark of Frailty 5 Bone Lance 6	Mark of Frailty 8 Bone Lance 10	Mark of Frailty 11 Bone Lance 14	Mark of Frailty 14 Bone Lance 18
Light	Oath of Hallowed Ground 2 Grail Bolt 2	Oath of Hallowed Ground 6 Grail Bolt 6	Oath of Hallowed Ground 9 Grail Bolt 10	Oath of Hallowed Ground 13 Grail Bolt 14	Oath of Hallowed Ground 17 Grail Bolt 18

Level	Life	Defense	Str	Dex	Damage (+ weapon)	Resistances
10	167	103	34	34	5-8	8%
30	467	323	54	54	11-16	25%
50	767	543	74	74	17-24	42%
70	1067	763	94	94	23-32	59%
90	1367	983	114	114	29-40	76%

Man-at-Arms (Camelot)

Weapons: sword, axe, mace. Helms: helm, knight helm. Can't be staggered or knocked back.

Variant	Skills at 10	Skills at 30	Skills at 50	Skills at 70	Skills at 90
Combat	Oath of Might 2 Earthsunder 2	Oath of Might 6 Earthsunder 6	Oath of Might 9 Earthsunder 10	Oath of Might 13 Earthsunder 14	Oath of Might 17 Earthsunder 18
Warcries	Rally to the Standard 2 Dread Cry 2 Tempest of Steel 2	Rally to the Standard 5 Dread Cry 5 Tempest of Steel 6	Rally to the Standard 8 Dread Cry 8 Tempest of Steel 10	Rally to the Standard 11 Dread Cry 11 Tempest of Steel 14	Rally to the Standard 14 Dread Cry 14 Tempest of Steel 18

Level	Life	Defense	Str	Dex	Damage (+ weapon)	Resistances
10	245	198	70	42	10-16	6%
30	701	638	107	67	23-33	20%
50	1157	1078	145	92	36-50	34%
70	1613	1518	182	117	49-67	48%
90	2069	1958	219	142	62-84	62%

Costs

Mercenary level	Hire (account gold)
10	130
30	690
50	1730
70	3250
90	5250