I don't think he considered Nomad as yet. Then again, all you need for Nomad is the ability to wield a Rune Crossbow, 57 Summoning for a Spirit Kyatt and plenty of lifepoints.
Melee stats, unless really high, are irrelevant, and if you rely on ruby/diamond bolts then it's a simple case of hoping for the special damage and letting the kyatt do the rest whilst you feed rapidly on brews, reducing all combat stats to 0.
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Back on a slightly more on-topic note, I'd say every single quest boss in the game can be beaten at around the 70-in-everything mark, and certainly at 80 in the melee skills.