What about Healing Signet?

You still don't need it, and you're going to be relying on your monks anyway. Self-healing only matters if you have a horrible backline (PuGs) or if you're running off by yourself in AB or something. LC can also help counter a spike, having a quick activation, and take some abuse and pressure off your monks. Particularly in Hard Mode PvE, or when H/Hing it. The adrenal gain makes it a good utility choice skill, and far better a skill than most Tactics defense skills.

Using a defense stance so you can heal sig in combat is bad. Use kiting skills instead. The best part about the "kite" skill is it doesn't take a slot on your skill bar. If you've figured out how to kite while using Healing Sig, please, let me know your secret!

If you don't have Nightfall, yeah, I'd go Tactics to take Healing Sig, but it's not the automatic decision it once was. Curse you, Paragons, for ruining the Tactics line!

LC can also help counter a spike, having a quick activation, and take some abuse and pressure off your monks. Particularly in Hard Mode PvE, or when H/Hing it. The adrenal gain makes it a good utility choice skill, and far better a skill than most Tactics defense skills. Healing 100 hp with a 1 second cast time is not countering a spike, it's making up for a bad backline. Warriors spike things, monks counter spikes.

The people telling you to kite while using healsig are PvP players who are not primary targets. That's exactly the right decision there, but it's mostly pointless in PvE where things tend to to focus fire whoever happens to be standing in front. In PvE, LC is better than healsig, but both are completely unnecessary in a team with a non-comatose backline.

Healing 100 hp with a 1 second cast time is not countering a spike, it's making up for a bad backline. Warriors spike things, monks counter spikes.

The people telling you to kite while using healsig are PvP players who are not primary targets. That's exactly the right decision there, but it's mostly pointless in PvE where things tend to to focus fire whoever happens to be standing in front. In PvE, LC is better than healsig, but both are completely unnecessary in a team with a non-comatose backline. Healing yourself for 100 hp in one seconds is like the best self heal ever, even compared to monks self heals (maybe with the exception of WoH when your health is below 50%).

Healing yourself for 100 hp in one seconds is like the best self heal ever, even compared to monks self heals (maybe with the exception of WoH when your health is below 50%). Only if you're terrible at math. At 12 healing and 12 DF, even a weakass orison of healing will heal for 100 hp in one second. Orison is also one of the least efficient monk heals, so this should give you a hint on the numbers.

If you're serious about countering a spike, a healer's boon heal other heals for nearly 300 hp in 1/4 second, while infuse health heals for around 400 hp in 1/4 second.