The Windies have decent bowling options atm, but they need to find some batsmen to equal Chanderpaul fast.
Commentators, at least in New Zealand, often mark 40 as being the mark of a quality test player. Personally, I think that if you want to be in the top four in the modern era you need at least two batsmen averaging 50 or more. Before someone raises England, without checking the stats I think you'll find Cook, Trott and KP have 50+ averages coinciding with their rise into the top ranks.
I haven't seen anyone from the West Indies, New Zealand or Sri Lanka (younger than 35 in their case) who makes me sit up and say "that **** there....that **** will average 50 in test cricket." Two of those bottom three sides have bowlers who will average under 30 and maybe even around the 20 - 25 mark, but you need the batsmen and you especially need solid openers because without the top order at least denting the new ball your middle order won't average 50.
On the Pakistan thing, while Gul is average and Junaid is as raw as the pacers in the bottom three, Pakistan still easily edge the bottom three because they have Younis Khan, Misbah and some quality young bats. But most importantly, they have Ajmal. He wins any comparison by himself. Provided Pakistan don't throw their toys out of the pram and drop all the batsmen who have strike rates below 80, and provided they are playing to win, they will destroy the bottom three because Ajmal.