Ground: 10 from gambling, 2.5 from omega armor, 12.5 from five omega 3sets, 3 from romulan passive, 3 from lucky, 2.5 base, making 33.5, or 34.5 if you take Pakled and exchange Lucky for Dumb Luck. Actual numbers may vary by as much as +/- 0.5% because of (presumably) compounded rounding error.
You can add another 11.5 (I think) to that by adding a crithx3 weapon, Strike Team, and Target Optics, but that's not constant.
On ground all 3 of my current builds sci, eng, and tact sit crouched at 35 percent base crit chance. That's constant base as I always shoot aim/crouched (for the most part)
With my tact traits and captain/kit powers I can cap out at 56 chance just from my tact alone not including other possible tact rally cry to stack with mine. This does not include feresean chag grass 2% (which I no longer stock) or any crit chance from weapons.
Silly mortals with their weaksauce energy weapons! We science gods are cranking out close to 100% crth with Particle Manipulator, making every TBR pulse or EWP smear hurt just a little bit more. Even factoring in my feeble torp weapons (gotta do something between CDs), I'm still parsing 70-75% in ISA.
Don't mess with me! I'm a bona fide PvPer!
can also address the opposite end of the spectrum,
lower your targets defence and resistances,
once a ship is at a dead stop its defence goes down, so tractors, gravton pulse, anything really that kills speed and turnrate, also mind you- I believe that engine power itself plays a big factor, so, if you drain their engine power well below zero, I think they get slapped with a even bigger negative defence rating, in short = more crits
then theres the resistance side of things, so, sensor scan, attack pattern beta/delta, fire on my mark, hyperflux- few others chew away at the targets resistance levels (sensor scan alone will strip like 80 some resistance from a target, hyper flux gets rid of like 60 or so and they both can stack to send the resistance way down into negative level both me and finn tested this),
cause I believe with emo's approach- hes chasing that 1 big hit, hes looking for that 1 k.o. punch, and as important as it is to crit, and to max out as much of that damage as possible, its still a good approach to look at the other side of the equation, your target so getting your target's defense to zero minus alot, and their resistance to zero minus alot- you have hits that do insane damage and crits that WILL BE 1 hit kills