More use offensive cooldowns

Life Tap is your main skills back to blue you probably once every 30-40 seconds to go. Consumption value of life so you need some defensive skills.

There are a total of five defensive skills. Three of which are based on the talent you have wit use them to protect your blood while allowing treatment to reduce stress.
Soulshatter .50 yards lower 90% .2 minute CD of your hatred.
Immortal determination to reduce damage taken by 40% and immune to interrupt and silence effect lasts 8 seconds .3 minute CD
The dark regeneration. T1 talent. Recovery of 30% of the maximum value of life so that you and your pet. Healing received increased by 25%. Lasts 12 sec the .2-minute CD
Sacrifice contract. T3 talent. Pet sacrifice half the value of life and in order to provide a damage absorption equivalent Shield sacrifice 200% of the value of life. Lasts 10 seconds and .1 minute CD
Dark trading. T3 talent. Resist all damage for 8 seconds. 8 seconds after the shield disappears, you will be a value equivalent damage by 50% damage blocked .3 minute CD

5.5 More use offensive cooldowns.

Generally dark soul: sadness difficult Summon Doomguard Summon Hellfire. Based on your choice of natural skills.

Let's say for Doomguard and Hellfire.

5.5.1 Doomguard Hellfire

In most cases Summon Doomguard is your first choice if faced with a large number of enemies then in relation to the use of the Hellfire.

Summon the Doomguard and call the Hellfire will summon a Doomguard / Infernal help you battle. Lasts 45 seconds .10 minutes cooling that means basically a battle can only be used once skills you Doomguard / Hell fire damage depends on the current panel injury law and crit so you summon a Doomguard / Infernal after any upgrade on the panel will enhance their DPS ..

So you need to trigger these buff in your Summon Doomguard / Infernal
The law injury or crit jewelry effect
Qinglong syrup
Weapon enchant Enchant Cloak (tailor)

This usually leads to the best use Summon Doomguard / Hellfire timing of when the fighting began. Course, you can also own according to the different needs of the Boss selection.

If you choose T5 talent Grimoire: evil governing. Doomguard and Hellfire is strengthened: summon of fear guards and summon abyss magic