Need help crafting mods on a Sceptre for my Storm Brand

Hi guys, I'm pretty new to the game and I don't understand much about crafting @ the crafting bench. I made a storm brand using Zizaran's build (youtube video) and I have this sceptre: https://i.imgur.com/8JIcVR7.png

I don't really know what to craft the new one with, should I use:

"Add 6-8 to 100-113 Lightning damage"

or "45-55% increased ligthtning damage"

or even "45-55% increased spell damage".

Or should I wait to have "can have multiple crafted mods" ??

Even though I'm new at the game I'm loving this comunity and thought you could help me :P

Thanks in advance!

(ask me anything if I missed some info you need to help me!)

A) DO NOT craft "Add 6-8 to 100-113 Lightning damage"

Look at your new scepter. It has a mod that says "adds lightning damage TO SPELLS" This is important. The mod listed in A) will only apply to ATTACKS (hitting things with your scepter) It is NOT a spellcaster mod.

B) Items can only have 6 affixes (3 prefixes and 3 suffixes). Multiple Crafted Mods (a suffix) is only good if you can add 2+ crafted mods after that. Go into the game options and find 'advanced item descriptions', and turn that on. After you do, you can hold ALT and hover oven an item to see what mods the item has. Your scepter looks to have 1 open prefix.

If all of your damage is lightning damage, the 55% lightning Damage mod and the 55% spell damage mod are functionally identical. If you have other sources of added damage to spells that are NOT lightning damage, the Spell Damage mod is better, because it applies to all damage your spells do, not just the lightning damage.