Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

The Druid spell Crumble dont do much dmg on a Golem/ construct with max dmg it was 90 for a lvl 21 druid and that is Soinc it sould do extra dmg but let me tell you that the mage spell Chain Lightning do much more dmg on some Golem/construct not all but it do extra dmgs on some Golem/construct why we dont know but that is the way it is Sould Soinc do extre dmg to Golem/construct?

Unless the construct is immune to sonic damage, this spell really can do some heavy damage to them. No save, no spell resistance, and it can be maximized or empowered meaning a lot of un-resistible damage.

As per wiki, the reason damage is lower is because there's no save or SR check. Of course, you could argue it's niche and therefore should be stronger. I would agree. I have made a similar argument with the anti-shapechange spells and got the sense there won't be changes. Maybe it's just the lack of hands on deck. If I were you, I would move on.

But the Golem/construct is not immunie and i did use maximized but i was only lvl 21 but then agian if i only do 90 dmg with maximized then i dont see it as a Powerfull spell ,This spell really can do some heavy damage to them couse it is a lvl 6 spell so it will be a lvl 8 or 9 maximized so it is not worthy to use maximized or empowered.

That's true, but what would have happened if you used Chain Lightning and failed the Spell Resistance check? You would have dealt no damage. What if, even after passing the SR check, Golem would have passed the Reflex save? You would have only dealt half the damage. Crumble bypasses that, but only in a niche scenario (constructs).

those that have a weakness for electricity take the dmg others do not i know there 2 or 3 that take extra dmg for electricity

If you don't pass the SR check, they won't take any damage at all, vulnerable or not.

I dont rememebr their have SR on

Crumble disregards SR, therefore justifying lower damage output.

Keep talk about SR as i told you it didt do much dmg 90 and there was no SR

The reason it does less damage is because it doesn't care for SR and saving throws. Don't know what else to tell you.