The pro's and con's of each skill are very evident.
From Protecion Ki (which I'll refer as PK) we have:
-50% damage reduction during 10 seconds, making it 100% effective during its activation time.
-Has a rather long CD of 120 sec. (2 min.)
And from Flee (which I'll refer as FL) we have:
-Has a shorter CD of only 60 sec. (1 min.)
-From the 10 sec of activation time, only an average of 2 sec (or 20%) are effective because you're not dodging 100% of the time.
From a first glance, PK seems a better option right? but stillhow effective is FL compared to PK? is it a good alternative?
Let's imagine this scenario:
-You're constantly being hit by a mob for a constant damage of 10 each second during 4 minutes or 240 seconds.
-In those 240 seconds you have the chance to cast PK 2 times or FL 4 times.
-From PK you have a total of 20 sec of protection, and from FL you have 40 sec of protection.
If you have no buffs on, this is the total damage you would receive:
10*240 = 2400 dmg
With PK activated:
2400 - (10/2*20) = 2300 dmg (-4.17% dmg taken)
With FL activated:
2400 - (10*0.2*40) = 2320 dmg (-3.33% dmg taken)
In those 2 scenarios you recieve less damage by using PK, which is 25% more effective than FL to reduce damage.
Now, many of the FL-lovers may think "But what if my Monk is an AGI Monk? shouldn't I get more benefits due to my already higher dodge rate?" The answer is no, simply because the 20% increase is independent from your total dodge rate. If the skill read something like +50% of you dodge rate it would be a completely different story.
So, is FL as good as PK? Unfortunately no.
Is it worth maxing and use it? Definitely yes, but it also depends on the kind of build you want to make.
PK is strictly better than FL, but FL is still good and definitely worth maxing for those who want to be full-fledged Tankers. For those who want to improve their DPS then you could allocate those 5 points somewhere else. In this case I personally would prefer PK over FL, mainly because you already have to spend 1 skill point on PK to get access to Steel Body. However if you also prefer to neglect Steel Body to further improve your DPS capability, then FL could be a good alterntive, although I would never sacrifice +35% HP and 2x Def only to get +10% Atk Pwr, but that's just me.
Finally, there is one final scenario I would like to address for those who choose to max both skills: What is more effective to reduce damage as much as possible? having both buffs activated at the same time or only one at a time?
This is an easy question to answer simply because if you have PK active the 10 sec are effective because during those 10 sec the damages is reduced, while FL in average only 2 seconds are effective because during those 10 sec you're not doding 100% of the time, meaning that from 20 seconds, 12 seconds(or the 60%) of protection time is effective, but if you have both active, from those 10 seconds, 2 could be active from FL which would make your PK only effective for the remaining 8 seconds, having only a total of 10 seconds of protection from 20 seconds of attacks.
Again, maths don't lie:
If during 20 secs you're attacked at 10 dmg/sec the results would be these:
10 secs of PK: 100/2 = 50 dmg
10 secs of FL: 100 - (100*0.2) = 80 dmg
Total damage: 130 dmg
10 secs of PK and FL: 100/2 = 50 - (50*0.2) = 40 dmg
or: 100 - (100*0.2) = 80/2 = 40 dmg
10 secs with no buff: 100 dmg
Total damage: 140 dmg
Given the results above, it is strictly better to have only one buff active at a time to get the best of both of them.
If I'm missing something feel free to comment it.
Edited by JustGabe, 28 May 2013 - 03:06 PM.