Hello and welcome to the greenskins! What fun we have.
First, I'm sad to hear about the arrer boyz, I was thinking of running somthing similar, taking a unit of 20 w/ full
cmd and using their volley fire each turn until they get into combat, where they can still hold their own.
From what I see you have, what I would do is combine your night goblins into a larger block, 30-40 models large. Give them a standard and musician, plus nets and 2 fanatics, I usually repeat that build 4-5 times per army list for higher point games. Very good tarpit unit, and fanatics ALWAYS cause an opponent to pause about their battle plans.
The spiders are a pretty good unit, run them as a single unit of 10, or two units of 5, either way works. Their best use is to go after warmachines (obviously) but I also have had success charge baiting enemy units off the board.
I'd almost follow the same format with the boyz as I do with the night goblins, if you're going to take them, take them in large numbers, NEVER take an orc or goblin infantry unit under 20 models, just a waste. Boyz have the ability to be upgraded to big'unz and given the banner of butchery, which can make for all kinds of fun S5 attacks in one round of combat.
That goblin shaman can come in handy, keep him as a
lvl 1, or go for broke and make him a
lvl 4, either way give him the staff of sneaky stealin (great magic defense item).
Another option for magic defense, is on that big'uns unit, take the spirit totem instead of the butchery banner, +3 dispel dice is huge.
Kenshin is right about night goblin big bosses, not that useful. Best use if just give em a great axe and stick them in a unit of night goblins. He's 35 points, but gets 3 attacks at WS4 S6. Yeah he'll have no save, but with T4 and nets from the unit, even chaos warriors are wounding on 5s (assuming no halberds or
GW). So it'd be in the unit's best interest if the enemy decided to waste attacks on him.
I try to put two of them in a unit, adds 70 points to the unit cost, but what they do is worth it
imho.
Anyway, that's all for now, I'll come up with more stuff later.
p.s - I still like chariots, especially our cheap hard hitting ones, try and get em in your llist!