I would like to play the most powerful build in the game to date. Currently playing a Templar with Lightning Strike. Made it to level 75 and get crushed in maps. I don't want to tweak the build to get it where it can beat maps. I want to build a character that breezes through the game. If that helps.
I'm not familiar enough to actually make an EK build, but there are plenty of guides available. Would recommend any of the builds that are "tanky" as EK hits like a truck and needs very little help in that department.
I'm much more well-versed in lightning arrow, you have a lot of options here. You can go LA as virtually any class but I would recommend against going Witch or Shadow, Ranger, Marauder and Templar are ideal.
The biggest boon of Lightning arrow is that each arrow will burst and do an AoE attack when it hits a mob, hitting up to 3 additional mobs. This can be combined with multiple projectiles and chain to a devastating effect, you will be shooting 3 arrows that hit 4 targets (additional plus 3 aoe) and then chain two times each and at each chain hit 4 more targets.
One shot = 36 hits. Lightning Arrow uses Life Gain On Hit support gem, my level 18 LGOH gem gives me 29 health per hit, so hypothetically if I hit a pack and do the full 36 hits (not uncommon at all, only need 5 mobs for it to happen) I heal for 36*29 = 1044 life instantly. I made my build as tanky as I could without losing significant DPS, but its possible to build a more devestating build or a more tanky build.
This is my build currently at
lvl 82
This is my Tanky Blood Magic Lightning Arrow Ranger: