Permissions Help?

Ok, I am brand new to Permissions, I just looked up a few tutorials to guide me, and I came up with this:

groups:
default:
default: true
permissions:
- modifyworld.*
- essentials.tpa
- essentials.tpaccept
- essentials.tpdeny
- essentials.tpahere
- essentials.home
- essentials.delhome
- essentials.sethome.multiple.3
- essentials.back
- essentials.back.ondeath
Owner:
prefix: '&4[&4Owner&4]&4'
permissions:
- permissions.*
Admin:
prefix: '&1[&1Admin&1]&1'
permissions:
- permissions.*
inheritance:
- Owner
Helper:
prefix: '&6[&6Helper&6]&6'
permissions:
- modifyworld.*
- essentials.time
- essentials.jail
- essentials.kick
- essentials.fly
- essentials.back
- essentials.back.ondeath
- essentials.sethome.multiple.5
- essentials.tpa
- essentials.tpaccept
- essentials.tpdeny
- essentials.tpahere
- essentials.time.set
- essentials.home
Moderator:
prefix: '&3[&3Moderator&3]&3'
permissions:
- modifyworld.*
- essentials.ban
- essentials.ban.exempt
- essentials.ban.notify
- essentials.ban.offline
- essentials.banip
- essentials.broadcast
- essentials.clearinventory
- essentials.fireball
- essentials.invsee
- essentials.spawnmob.*
- essentials.tempban
- essentials.tempban.exempt
- essentials.mute
- essentials.mute.exempt
- essentials.kill
- essentials.kick
- essentials.kickall
- essentials.vanish
- essentials.back
- essentials.back.ondeath
- essentials.delhome
- essentials.home
- essentials.sethome.multiple.10
- essentials.tpa
- essentials.tpaccept
- essentials.tpahere
- essentials.tphere
- essentials.tp
- essentials.setwarp
- essentials.time.set
- essentials.fly
- essentials.gamemode
users:
DrakeH44:
group:
- Owner
permissions:
- permissions.*
ELEMENTAL1998:
group:
- Admin
permissions:
- permissions.*

Now, I know it can be simplified, which I also need help with, but none of it will work. I have Essentials and PermissionsEX, which I heard can clash. How can I fix this? Any help is appreciated!