I tried many strategies with the psycho and i find this one to be the best. However, the only attack i have developed from the electric tree is the electrical storm so i mostly use shadow attacks. This is not a guide, i don't tell how to beat the bosses or specific enemies, i just describe. So:
1/4 dark echoes 1/4 destruction 1/4 salvation 5/5 tenacity 1/4 shock therapy - electron charge and high voltage 4/4 electrical storm 1/4 betrayal 4/4 terrify 3/4 free will 1/4 retrograde 1/1 overdrive 3/4 epiphany 2/2 implosion 1/1 psychopath form 4/4 nightmare
This pattern will show you how to do extreme damage and extreme healing.
DAMAGE: 1) Cast epiphany 2) Cast dark infusion 3) Dark infusion 4) Implosion
This will do about 4000 - 5000 damage to a simple enemy (And 20.000 damage to the police colonel if he has reloading).Then, throw in a nightmare and you probably killed the guy. The damage that this combo will do depends on your stats. You should have about 400 instinct and 230 speed just to attack first.
HEALING:
1)Cast nightmare on you 2)Cast terrify on the enemy 3) Free will on you 4)Implosion on you
This will make the healing over time for 1 turn 600 stronger so observe how much damage you heal every turn and multiply it x7. Those are the extreme damage and healing combos with the implosion. Hope they'll help you.
ALSO NOTE: this pattern will take all your ability points to evolve so if you want to try it on heroic or challenging, use an other build until you reach Hew , and then re-spec and do this. You also have to be lv 30 but if you are not, cut some ability points from where you don't find them useful and develop these abilities later. For the attributes, I have 400 instinct, 250 vitality, 235 speed, 26 strength.
This method is somewhat impractical. Casting Nightmare on yourself, assuming you have low HP and high Instinct as most Psychos do, will probably kill you anyway, especially if you're using it to heal. Also, I'd omit Dark Infusion for the damaging tactic, and replace with Shock Therapy, each of which can deal around 5000 damage with a full Electro-build.
I know you're not using electric attacks, I was saying that you should implement electric attacks into the build. Also, if you're using Nightmare to heal yourself, chances are you'll use it when you have low HP, which increases the chance you'll kill yourself with it.
If I was using this build, I'd swap Terrify for Retrograde, which, in conjunction with Nightmare, will instead heal you for 520% of your Instinct.