Goblins are a great army, with plenty of choice to always keep you interested, and your opponent nervous. If i had one critique with your own list, it’d be a shortage of core units., and insufficient support for those units. I tend to build armies on the old Warhammer Fantasy template, so 50- 60% core units, 20-30% Elite/artillerry and the 10-15% on HQ. (or Toys for the boys).
So, to use this example , you have a regiment of Sharpsticks and 2hordesof rabble. (345 points) If we include the 2 units of trolls and artifacts, it brings it up to 740. Now, before we go any further, let’s suggest a must do change. You need to have mawpups on those goblin units! That is a must do, IMHO. Even hordes of Goblins couldn’t hit the side of a barn when nailed to it, so an additional D6 attacks, hitting on 4s with crushing strength 1 is not to be sniffed at. The Mawpups ill probable do more damage than the goblins themselves. Whether you spend the 10points each per unit to bring your total to 770 or change an artillery piece to a Mawpup Launcher, is up to you. With only 3 units , it might be cheaper to just add 10 points. Each unit will probable not get a chance to reload with more mawpups .
Another critical addition would becheap wiz with Bane chant, (andInspiring Talisman, sitting between 2 hordes,where he cant be hit, and buffing one before they go into combat.
That brings you to 855 points . If you have points over, consider mounting the Wiz.
Now, let us pause for a moment and consider the Formations/Battle Groups. Look again at the 2 hordes of Goblin Rabble and the supporting Wiz. He gives them a punch of Crushing Strength, and leadership when they need to test morale, and they in turn protect him from getting hit, cause he is roadkill otherwise. That is how battle groups work, Making the individual parts of the Formation greater than their individual parts.
Let’s add the fleabag riders troop now, (with Mawpups) . Personally, i would, and do, take at least Regiments or hordes of these, because they rock! Fast, nimble Thunderous charge, viscious hitting on 4 and defence 4… what is not to like about them? But, you have a troop, so we’ll stick with that for now. As a troop, They might be good to hang back and protect your artillery from Flanking Cavalry or flying pests. If so, consider changing to Fleabag Rider Sniffs for long range shooting options. So we will add your artillery, and Winggit at this point, with all the bells and whistles, bringing your total to 1340 points.
I would consider adding a regiment of Luggit Gangs or even the full Formation from the latest upgrade. They certainly pack a punch. But for now, we’ll stick to your list.
I love Magwa and Jo’os, (and Kuzlo & Madfall too) They are both nasty and add coolness. Kuzlo &Madfall are a wild card though, so run outsideof formation. Magwa and Jo’os however, are not, and could slip comfortably into a battle group with your trolls, giving them leadership and gaining some additional muscle and protection. They areall speed 6, so will do well to either hold your centre, or as aflanking wing of your army. The Trolls wont need a staying stonewith him around to boost their morale, although as hordes they should be ableto cope without a boost anyway.
That leaves you with a Giant , 2 mincers and a Flaggit.
You could put the Flaggit near the Sharpsticks to give mutual support, but i think you’d be better with a Troll Bruiser for your troll units, and put Magwa and Jo’os protecting your artillery and for speedy support . Given your units, i’d make the mincers into a Mincer Mob troop, giving you D6+14 rather than 2* D6+6 and better nerve for 40 less points. Stick Magwa with them on one flank, maybe with the Giant too, and watch your opponent sweat as they grind up the field .
That would take you to 1875 points. Personally, i would pick a Goblin Slasher over a Giant, even though the giants look great. It is cheaper, gives you additional ranged attacks with Steady Aim too, and has better Me+.
Total 1875 points so far, which will give you a bit extra points to play with to add Fleabag Riders, Lugits or some Spitters to sit back and hold your objectives, while discouraging attacks on your artillery.
I’ve had limited success with Artillery, especially Goblin artillery, and fielding 3 units of artillery wil paint a big target on them, so they will need protecting. Also, i doubt you will have enough shooting options to use them effectively. (again, i’d consider a Goblin Slasher instead. Although this option might make your Eye in the Sky Winggit obsolete as it doesn’t have the Lobber keyword )