After having extensively tested most of the commonly used Blood Pacts, I turned towards the ones gathering dust. There were several gems out there which have some pretty amazing (unused) potential out there.
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Healing Ruby
* Approximate formula if your level is less than or equal to 30:
HP Restored = 14 + Level + floor[TP/12.3]
* Approximate formula if your level is greater than 30:
HP Restored = 44 + 3*(Level-30) + floor[TP/12.3] * floor[Level*0.075 - 1]
One less than 30 is inaccurate, couldn't lower level below 30. Appears to add variable amounts of HP depending on TP/LEVEL.
Does NOT appear to be +X HP for every Y TP. See Wiki for testing.
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Slowga
Bigclaw (base) Delay =
START: 9:07:41pm
END: 9:09:39pm
HITS: 30
Time taken: 118 seconds
3.93333 seconds/hit = ~4sec/hit
Delay 240
With Slowga....
START: 9:35:06pm
END: 9:36:40pm
HITS: 18
Time Taken = 94sec
5.2222 seconds/hit
Delay 313?
11hits
time=57sec = 5.18181818 seconds/hit
55:30
13 hits
56:38
time=68sec
5.23secs
About 5.2 seconds:
Delay = 312
Increase in delay = 73
Percentage Slow = 30% (!!!)
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Sleepga
Range = 8" (around Target)
Dark based.
Duration: 90 seconds.
Same tier rank as Sleepga.
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Nightmare
Centered around Target.
Very small radius (4"?)
Darkness based.
Duration: 90 seconds, though often resisted down to 60 or 45 seconds.
Same tier as Sleepga.
Bio is 2hp/tick.
Additional DoTs WILL stack WITHOUT waking the monster, except those that deal "initial" damage, e.g. Bio/Dia/Helix
DoTs (including Bio) already on the monster will NOT wear off when applying Nightmare.
Implications
You can load up on DoTs (bio 2 included!) and then use Nightmare, the monster will sleep with an incredibly potent DoT on them.
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Thunderspark
Appears to have no dINT cap. Formula is still in progress but appears to be along the lines of:
Damage = (275+dINT) * MAB/MDB
How TP interacts with this is still unknown, appears to be 3 damage / 8 tp(?)
Paralyze seems very strong, comparable to Paralyze II.

