Effiency requires players to be at level 26, while it's lower in the Upgrade Artist tree.
Personal Firewall 2.0 requires players to be at level 24 while it's higher in the Upgrade Artist tree.
Checked all the other hacker tree's, that build up the same but their levels are the other way around, having the level 24 ability first and the level 26 required to load further abilities.
