Thanks for the replies.
One reason for starting this thread was that I found the Arcane Archer tended to be a very successful adventurer. Indeed, it is only with an Elven Ranger/Wizard/AA that I have completed BR1 The Fall of Ulad, and reached Level 40 in Endless Nights III without dying. However, I believe this is as much to do with my mindset when playing the character, rather than any innate strengths of the particular class combo itself. I believe you play more intelligently with a character that is not Uber, and relies, at first, on a relatively weak weapon. You are also have a distinct disadvantage in a lack of cleave feat at earlier levels, which can cut your number of attacks by half per round, and thereby increases the melee attacks against yourself. That can lead to a very short life span. Returning back to BR1, one of the items that you can acquire is a book that allows you cast Blade Barrier once per day. You are supposed to hand it over to another, but its too useful to part company with. This was the first time I began to use spells that can effect opponents as they come towards me. If you are invisible and then cast a cloud of bewilderment in front of yourself, you remain invisible. The same applies when you cast bladebarrier. Then you start shooting, enemies will try to run through mist, and plenty will be stunned at this point. This groups many foes in one place, a perfect target for your fireballs.
My first AA was an Elven Fighter 9, Wiz 1, AA10 at level 20. After obtaining epic weapon focus in long sword and longbow by level 27, I would take level 10 fighter at level 27 to gain epic weapon specialisation in both. Then it was about raw damage.
When I realised that being sneaky was often a safer option, I then went Elven Ranger 9, Wiz 1, AA10 at level 20. I found the additional skills, spells, and favoured enemies made up for lack of weapon specialisation. Entangle and grease are two level 1 spells available to a ranger with wisdom 12 at level 6. I'd also take a level of ranger after Level 20 to gain another favoured enemy and level 2 spell.
Then I went Elven Bard Level 8, Blackguard 4, AA8 at level 20, which allowed me use of Divine Might, and awesome levels of damage, combined with a useful set of skills and spells.
The last AA I played was a Half Elf Paladin 9, Sorcerer 1, AA 10 at level 20. This is fairly specialised, but is slightly tougher and harder hitting than the previous option.
My latest character is currently a Wild Elf Ranger 1, Sorcerer 10. I will continue her as a Sorcerer, except at level 20, where I'll take a level of Paladin for the save bonus, and the additional attack per round. However, I have also built her around extensive use of the bow, so that I don't need to use my many of few spell choices
on ranged damage attacks. It's working quite well, although I have had to use keen edge, greater magic weapon and flameblade as three of my spell options, because some monster will always get up close and personal.