This might be the most companionisty CYOA after Space Bounty Hunter and Star Dust.
Professor Lana Paladin x2 (2 Fire, Arcana and Investigation)
Investigation, Arcana, and Combat Skill 3, Command and Wild Lore 1
Lore of Fire 4 (Arcana's > lvl 5, what need for lightning?) 13, 1 in each lore for arana bonuses 8, Lore of Water 3 (to use the healing boon) and Lore of Earth 2 (telekenises>air) leaves 1 pt left for whatever's discovered or needed.
Knighthood, Artificer Plate, Golem, Basic Ranged Weapon, Travelling Supplies, Wardog, Small Ship and still enough to buy an army.
GARD kills demigods. What more could you need? Lucfil, Hans Elfguy, Roland, Void Shard,
GARD solves most combat problems. If cleverness's needed that's for the rest of the party.
Roland's a scout so we can avoid trouble, get advantageous positions or outright ambush enemies as needed, have escape routes, and so forth.
Lucfil and Hans both buff the PC, possibly over the built-in default max of 3 for combat, so he's a supereme combatant himself.
Finally Void shard is counter-intelligence. He denies enemies awareness of our position, save maybe sensing a blank area or Roland.
Roland + Void Shard should mean we have an actionable intelligence advantage vs enemies
GARD + buffs should mean we can handle any physical threats.
Was looking but didn't see anyone for countering mental attacks, stealth subversion, traps, etc.