Based around lightning maniac build. This one has better armor and is a little less vague. All lightning, great defense, and medium roll.
Right: Lightning heide knight sword +10, binoculars
Left: Kings shield +5, lightning dragon chime +5
Rings: chloranthy +1, life ring +2, sun seal, clear bluestone ring +1
Equipment: vengarls helm +5, alonne knight armor +10, drangleic gauntlets +5, vengarls leggings +5
Sunlight spear, lightning spear, great lightning spear, heavenly thunder, sunlight blade, another great lightning spear (optional)
Tons of twinkling titanite needed to upgrade all this equipment.
The second great lightning spear is for more casts, nothing else. (You have to find it, then buy it from straid.)
The lightning infusion on the sword is best because the sunlight blade buff will be more powerful.
Get the dragon chime definitely, because it is the best chime for lightning spells. (Enchanted with lightning, it's even better.) To Get: kill darkdriver grandahl, or reach rank three in his covenant. (I kiled him…)
Vengarls stuff isn't too hard to get. You have to talk to him a lot, then kill his body after the dukes dear freja boss fight.
Binoculars for sniping.
Kings shield is optional. It's a good safety net.
Any questions? Just leave a comment.