Haha, heya Kyou, it's me Ara, nice little guide you have there, though I'd like to add a few things, if you wouldn't mind.
For bow builds, you missed out on my personal favorite guardian bow build, which would be the 235 build, which really turns it into a higher dura crit build comp bow, with a bit less range:
Attack 19-28 Critical 48%
Balance 30% Injury Rate 30~60%
Range -300
235 / 41,900G
For ego's to add, an Ego wing bow should also be listed, imo, considering they get decent max (only 12 less then an LLB ego) and amazing crit (11+ then an llb ego), and 2600 range, making them essentially one of the better egos around. I can't really get endgame stats since the KR mabi forum with the data on it has long since been bumped away by other KR mabi happenings, but I'll look for it.
As far as enchant suffixes, I suppose you could list
Thief,
Earnest and
Elegant as far as suffixes, since as you said, Crit is rather important for elves (I'm able to reach about 125 ish with my Revolver xbow/accessories, and I don't have prefixes on them yet/am using Polished Wisp shoes.).
Fearless and
Polished also make good crit prefixes (though certain gear should stay with certain prefixes) and I'd avoid ranking lightning bolt unless you have enough dex to make up for the loss of max/min from stiff hats (not just tailcaps anymore!). Raven boots are nice but if you're into fashion (which sadly I am these days) they don't work too good, haha. As far as snowdrop you can also get it rather easily from Prison Zombies in metus, however you'll either need a high ranked golem or some melee support for those (also; you can hunt for a hitting turban that way, if you're into those)
For titles,
Master of Thunder makes an amazing "mana tank" title, as it gives a good amount of dex and a good amount of MP at the cost of a little HP and str. Until Final shot's master title comes out, elves (unless elves in alexina have seal breakers?) are stuck with investing millions of gold for +30 dex master titles, so it'd be best to bide on that or Seduced the succubus for crit/mp/dex. I'd suggest against anything that has -will, including Master of range. You still do get crit from will, which is always, always nice.
As far as pet tricks, I can make a video sooner or later for what I like doing as far as mount archery for aggro control. If you shoot a mob on your horse, and dismount the aggro stays on your mount, in which case you can just make it use counter over and over to take the multiaggro heat off of you somewhat.
As far as protective wall, I find myself as more of an aggressive archer as in I like getting close to my enemies (which crossbow mag helps with, just run up closer and closer) so it doesn't help me too much, however I do use it to avoid explosions in places like provocation hard where the spider there hits really really hard.
For Golem, Snow golems have been one major buff to elves in particular because it makes NS2 things alot easier to handle/gives you a chance to handle meaner multi aggro things, but I wouldn't count them exclusively to elves, though I think they benefit them the most.
Anyways, I'm currently not in a place where I can type more data, so sorry if I left a few things out, I'll get to typing more later, probably.