It’s a passive skill around you, it does nothing
it’s a passive skill around you that does nothing else. Slow Time is an active version of this skill.
It’s a matter of how many traps you can have active at a given time, paired with the amount of damage they do in the end. Since Lightning Sentry kills most anyway, it’s just a stud. If you go without Conviction the fire/physical element is a nice addition to handle lightning immunes.
Tormentor and Bartuc’s can be painful, but CS deals so much damage even if they have very high resists. Good thing is that they are only in Throne room and not in Chaos Sanctuary.
An active skill is a skill you use to either deal direct damage, control the battlefield or impose a direct effect.
Any skills that act while you move is passive in their nature, and as such can be replaced a passive effect. The Wizard is a perfect example of this. Slow Time is an active skill, however in Archon form the Slow Time is a passive effect.
Cloak of shadows blinds the targets, it lasts for quite a while and it’s a strong crowd control skill.
Passive skill: Monsters around you are blinded and take extra damage.
Slow missiles again acts in an area of effect, as a result you only cast it when it would be useful (archers, LE monsters, etc).
Passive skill: Projectiles within 25 yards move slower
Easy as that, you can keep going.