Swell of Gloom - Worth it or Not?

Been a while since I've posted so I thought I'd land back with a bump and have a look at one of the tactics that I've been looking at recently and wondering whether its worth it or not

So, my base spec is:

Agony: 11 points spent including picking up Echo of Power and Impending Doom
Calamity: 17 Points spent, including picking up Vision of Domination, Shadow of Disaster and Hand of Ruin

and my tactic loadout is Endless Knowledge, Vision of Domination, Shadow of Disaster and Frozen Fury

My new spec (as of last night) is

Agony: 14 points spent including picking up Echo of Power and Impending Doom and Swell of Gloom
Calamity: 14 Points spent, including picking up Vision of Domination, Shadow of Disaster and Hand of Ruin

and tactics are the same except FF has been dropped in favour of Swell of Gloom

So, ultimately, I lose a small amount of WoP/VoT/HoR/CW damage and boost AB/FB/DB/ID/EoP by a touch, so these pretty much cancel out

which only leaves the difference between SoG and FF

Ignoring the backlash component of SoG (as in group play its pretty irrelevant anyway) its a guaranteed 628 damage (according to my tooltip) every rotation (additional burst!)

Whereas FF boosts the proc chance of frozen touch to 75% from 25%

some simple mathhammering now...

I'm only concerned about the damage during the burst window, during which time these spells will land on an opponent...

CW (one tick)
VoT
WoP
AB
GB
ID
HoR (one tick)

Assuming FT can proc off dot spells (not sure, will test) then with FF slotted (75% chance) you get 5.25 procs at around 200 damage per proc for 1050 damage total

If it doesn't proc off dot spells, then its only going to proc 3 times for around 600 damage total

So, with SoG slotted instead of FF,

Assuming FT procs off dot spells, its going to proc 1.75 times for around around 220 damage per proc (additional points in agnony boosting the damage slightly) for a total of 385 damage

If it doesn't proc off dot spells, then it will only proc once, for 220 damage total

And to this needs adding the 628 damage from SoG itself

In summary...

	FF Procs of Dots	FF doesn't proc off dots
FF slotted	1050 total damage	600 total damage
SoG Slotted	1013 total damage	848 total damage

So, for pure damage numbers, FF performs slightly higher if it procs off dots but if it doesn't then SoG massively outperforms it

However, even with the slight damage boost for FF if it procs off dots, I think the additional burst potential from SoG would make it worthwhile

Anyway, I'll play with this spec for a week or two and start checking my combat logs to see exactly what FT can proc off