Help for a boost capable stormweaver

Hi, I have a lvl 96 stormweaver at the moment and I can do all content solo with relative ease. But the problem is that I struggle in a party (I can hardly manage with a 2-members party and I struggle with anything more). I admit that my build (Archmage Spark) is not optimized and that's why I'm looking for a switch as we're nearing the end of the league (so there's no point in saving those farmed divs). I want a build suggestion (written or video guide) that is capable of boosting a 3 or 4 members party in maps and pinnacle bosses. Is it possible with a budget of ~300 divs? If it's not possible with a stormweaver, I also have a lvl 94 gemling. Thanks in advance for any useful information you can share with me!

Any ideas please?

Since you mentioned having a Gemling - attribute stacker with pillar of the caged god clears all current content both solo and in groups. Naturally it's expensive as hell, especially now with current prices but budged ver might be possible within 300div especially if you already have some items.

I recommend to look up Fubgun's Attribute Stacker build on Mobalytics site for complete guide on his version of this build. It's well written and offers tips on cheaper replacements for expensive pieces. If for some reason you dont want to look elsewhere or anything, here's a quick summed up info about that build:

Generally you'll most likely will have to skip Astramentis, From Nothing (Resonance), and Adorned+ corrupted magic jewels as each of these items costs more than 300div, unless you already have some or all of these.

If not then you'd want best rare amulet, jewels and rings with attributes you can afford after getting:
-HoWA gloves (4x attack speed and 1to10light damage for 20-30div will do),
-5socketed Morior Invictus (5%attributes + 10%all ele res is what you want but goes for more than 125 div so can take attributes +whatever you want and can afford),
-as close to 80% Ingenuity belt (25div) as you can afford + rare breach rings, ideally with highest tier triple attributes and some flat cold/fire damage.

I assume you should already have Melting Maelstrom otherwise get one for exalts/1-2div.
Jewels with max ES, crit hit chance, crit damage and at one 2% mana on kill. Get one 2%life on kill if you dont have unique mana flask yet and are not specced into Mind over Matter.

You'd want 2x Pillar of the Caged God, one with attack speed soul cores for clearing and one with elemental penetration soul cores for bosses.
Either get 3 sockets corruption or, two with 12% damage per strength and/or second one with 8% attack speed corruption.

Naturally it's nice to have everything perfectly rolled and with best corruptions but not necessary as this build gets really strong really fast with just what I mentioned. Shouldn't cost more than 300div total if you prioritise well.

Not having Astramentis kinda sucks since it doubles your dps in this build so if you have one that's wonderful. But it's still strong build even without it if you get the other, cheaper items and very good rare amulet + rings with attributes.

Tempest Flurry becomes your movement skill with enough dexterity but Ice Strike works for dmg as well.

Cheers

Thank you so much for your suggestion! That's exactly the build that I went for and as you said, I skipped the astramentis and all the expensive gear. But, again I can only do solo content. I really feel like it's an understanding problem and I'm lacking something but I don't know what it is. I'll look more into it and see what I can find out