Numerical Damage Tests

I gotta disagree. Better off taking Incinerate 6A for detonation, and you're also better off detonating the target with another power AFTER they've taken some burn damage.

It still has a good use for Human Engineeer with Snap Freeze

cryo turret/cryo beam/cryo mmo/cryo gauntlet/cryo explosion/cryo barrel/span freeze .. snap freeze doesn't care how the target was frozen

Yes, it's a class passive. Shattering frozen targets is an existing mechanic that Snap Freeze enhances. So it doesn't matter how you freeze them - turret, cryo beam, cryo ammo, etc. All that matters is that you're the one that shatters them.

Overload is not stated as a primer but it does prime for roughly the same duration as it stuns - 2-3 seconds. So releasing a detonator Incinerate right after Overload can produce tech explosion if travel time is less then 2 seconds.

I hate this formula.

It's worst than that, it's multiplicative... 75% * (1 + 0.3) = 97.5%...

If they have any shields left after overload, the incinerate will set off a tech combo but won't burn them. But with Overload maxed out you'll easily take their entire shield out.

you can check that in game. no need of special tools for that

"Hunted: In game/powers/cryobeam/imp_looping_cryobeam.ebx the non AoE is damage * 0.2, the AoE is damage * 0.25 (per tick damage)"

1.07 cryo beam 5B "radius" calculates damage per tick as /4 instead of /5 (sustained ability that ticks 5 times per second). This RESULTS IN A HIDDEN (1 / 4) / (1 / 5) = * 1.25 to all cryo beam damage vs single target multiplier. (on top of the ability being able to hit more targets). Probably a typo - they might've meant to dilute the damage over a larger area instead of giving extra AOE and EXTRA DAMAGE.

Anyway this makes it possible (easier/more likely) for the human engineer to 1-2 punch pretty much any clump of (even shielded enemies) using snap freeze domino effect without boosters. (it is not OP - it uses 2 time consuming charge up/sustained abilities that can be easily be stagger canceled, + very fragile class, especially without full fitness tree)
Charged up overload to remove shields to primary and CC group. Sustain Cryo Beam vs CC-ed group to remove rest of shields, freeze solid at least 2 and maybe even start the snap freeze chain by itself. If not, fallow up with finishing blow to frozen redbar from weapon. High damage per shot weapon might work best for the short time window before overload becomes available again for AOE damage and CC ..

example build
cryo beam: 4a damage, 5a radius and WAY MORE DAMAGE, 6a SNAP FREEZE CHAIN
turret : 4a , 5b (6m cooldown bonus aura) Changed my mind. Aura range is pathetic pins you in place. 
Overload: 4a damage, 5b bonus vs shield multiplier, 6b maximum charge
Offensive Tech:4a power damage, 5a vs shield multiplier, 6a ET debuff // we need CryoBeam to remove remaining shields quickly to have time to freeze targets
max fitness 4b 5a 6a 

Damage numbers with Engineering Damage gear but no Engineering Damage booster.

Cryo beam damage per tick
(150 / 4) * (1 + 0.3 + 0.5 + 0.5 + 0.3) = 97.5 cryo beam vs health
(150 / 4) * (1 + 0.3 + 0.5 + 0.5 + 0.3) * 1.35 = 131.625 vs health with ET

136.500 // vs shields *1.4 passive
184.275 // *1.4 * 1.35 ET

Maximum cryo beam damage vs health 14 ticks under 3 seconds:
(150 / 4) * (1 + 0.3 + 0.5 + 0.5 + 0.3) * (1 + (13 * 1.35)) = 1808.625

Overload Damage Numbers:
200 * (1 + 0.25 + 0.35 + 0.5 + 0.3) = 480 vs health; 480 * (1 + 1.25 + 0.6 + 0.4) = 1560 vs shields // non charged impact

Chain Overload:
300 * (1 + 0.25 + 0.35 + 0.5 + 0.3) = 720 vs health; 720 * (1 + 1.25 + 0.6 + 0.4) = 2340 vs shields// charged impact
100 * (1 + 0.25 + 0.35 + 0.5 + 0.3 + 0.5) = 290 vs health; 290 * (1 + 1.25 + 0.6 + 0.4) = 942.5 vs shields //chain