Vanilla fighter? A berzerker would sort this out with no gear at all? A barbarian too, but then you'd lose the sweet 5* in long swords.
Well if you're set on a straight fighter, the 10% amulet from the drow merchant replaces the 5% amulet nicely. Plus Maze is touch range, so you could just try to stay out of range, but probably not no-reload, one timestop chould send you back to candlekeep.
Hell trials are as follows:
Fear: Good: Immunity to +1 or lower weapons
Fear: Evil: +2 CON, Cloak of Bravery
Greed: Good: +2 saving throws, +20k XP
Greed: Evil: +15 HP, Blackrazor, +11k XP (genie)
Pride: Good: +20% Fire/Cold/Elec Resistance
Pride: Evil: +200k XP, +22k XP (dragon), loot
Self: Good: +10% Magic Resistance, -2 HP, -1 DEX, -75k XP
Self: Evil: -2 AC
Wrath: Good: +1 WIS, +1 CHA
Wrath: Evil: +2 STR, +1 primary stat (bug, probably fixed)
So, my resistance shopping list is as follows:
Pride & Selfish Good
Fear, Greed, & Wrath evil
Barbarian class : +20% physical (Innate)
Hardiness HLA : +40% physical (20 rounds)
Flail Easthaven : +20% physical (off hand)
Sword Balduran : 10% magic
Helm Roranach : +50% blunt (Gromnir)
Helm Dragon/Rock : +25% elemental
Ring of Fire : +50% fire
Ring gaxx : +10% Magic, 100% poison/disease
Cloak Mirror : spell deflection
Cloak Reflection : 100% Electricity
Boots Speed : Movement speed
Boots Cold : +50% cold
Boots Electricity : +50% Electricity
Inertial belt : +50% magic damage, +25% missile
Amulet Kaligun/Seldarine : +10% magic
Gauntlets Extra : +1/2 attack, +1 THACO, +2 Damage
Armor Red Dragon : +50% fire
Armor White Dragon : +50% cold
Armor Shadow Dragon : +50% Acid
Armor Flesh : 20% magic
With these items you can get your resistances to:
Fire: 145%
Cold: 145%
Electricity: 150%
Acid: 75%
Poison/Disease: 100%
Magic Damage: 50%
Magic: 60%
Slashing: 80%
Piercing: 80%
Crushing: 130%
Missile: 105%
As far as weapons go, 5* in long swords will get you pretty far, with an eye on Blackrazor in ToB, and the rest of your * in maces, flails, & axes will allow you to use the improved mace of disruption against undead & golems, the flails of ages & easthaven against mages & golems, and either Azureedge or Rifthome as your ranged weapon, with an option on Axe of the Unyielding in your off hand in ToB.