What is the formula for critical strike %

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Mark_GGG wrote:

Keep in mind that the best class for critting is probably the one not in the game yet.

yeah that's true, but as it is now (not sure about the re-vamped skill tree) theres only a few increased critical passives for them, and it's only for using daggers, and it's not an additional rating (+60) but increased %, which is a problem. Things like increased critical rating by a % need a buff.

5% armor buff is sorta decent (although still probably lacking in my opinion compared to additional health) when you have armor values like 1000, 2000, and 3000, but 6% critical rating is nothing when you have crit ratings of only 100, 200, 300; when compared to the rating bonuses of +60

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Mark_GGG wrote:

Keep in mind that the best class for critting is probably the one not in the game yet.

welp. INT/DEX confirmed for witch killer

mark you're a bro

not trolling; i really like claw weapons myself so i'd def play the int/dex when it comes out for that reason. who doesnt love crits?

I think the formula is something like this for spells:

Crit % = (Critical Rating Gear + Critical Rating Passive + Critical Rating Gem) / (0.5*Character Level)

With a minimun of 5%.

The critical on wands/staff doesn't affect crit %.

Basically you need half your character level in critical rating for a 1%.

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fr0d0b0ls0n wrote:

I think the formula is something like this for spells:

Crit % = (Critical Rating Gear + Critical Rating Passive + Critical Rating Gem) / (0.5*Character Level)

I'm quite sure that enemy level matters, so maybe also include enemy level in there.

Having the Character level in the divisor wouldn't surprise me. I actually really should have thought of that myself.

That said, .5*clvl seems a bit off. My lvl 63 character has 10.1% chance of crit at 356 crit rating.

Adding 95 crit rating (to 451) results in 12.5% crit rate.

There isn't a number that fits via that method, since .56 is close, but winds up short of both (one will overshoot the other will undershoot)

The other equation which divides by 33 (35 fits me better) is just as inaccurate, but not too inaccurate either.

At the moment, neither fit, so there is an offset (some sort of extra addition) or form of non-linearity going on.

Edit: Another point of reference is 5.5% chance to crit at 185 critical rating (lvl 63). So even at that point, the equations are close, but still off.

The enemy level doesn't matter, at least in the formula Dubby got me from the code.

The critical rating % for spells can't be seen anywhere in the UI, so I don't know how you know that you have 10.1%.

I'm talking about normal critical rating.

I don't see why it wouldn't work similarly with spell critical rating too though.

I didn't notice you were talking about spells, so it may very well be different, at least with regards to enemy level being factored in.

Anyway I just did some testing, and lvl 63 vs level 49 monsters, I critted about 24 times of 133 shots, which is over 17% (closer to 18%).
This was at an indicated 10.1% crit rate.
(Edit: it would have actually been at closer to 12.3% crit rate, since I forgot to take out my critical rating support gem.)
against level 3 targets I critted 34 of 126 attacks (27%).

While spells may be different, it seems like monster level affects at least critical attacks. Based off my quick stats, it's certainly not clvl/mlvl but still something unknown. My guess would be something like clvl*2/mlvl+clvl, but it doesn't fit very well with the lvl 49 monsters test though. (more testing should probably be done)

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fr0d0b0ls0n wrote:

The enemy level doesn't matter, at least in the formula Dubby got me from the code.

You sure about that? I was under the impression that the formulae are based on fighting against an enemy the same level as you.

I've got a formula that models your three examples pretty well xapti:

Chance to Crit = Critical Rating / ( Critical Rating + ( Character Level * 50 ) )

0.055 = 185 / (185 + (63*50) )
0.101 = 356 / (356 + (63*50) )
0.125 = 451 / (451 + (63*50) )

So if you level up to 64, you should then have 12.3% or 12.4% chance (depending on if it is rounded or truncated)



No idea about the level scaling part. For chance to hit, it's:
( 2 * attacker_level / ( attacker_level + defender_level ) )

So it might be something similar to that.

If the formula in my last post is correct, it means there is a diminishing returns effect with critical strike rating.

Here are some plots of crit chance at levels 10, 20, 30, 40, 50, and 60, using that formula.

0-1000 Crit Rating
0-2000 Crit Rating
0-4000 Crit Rating
0-8000 Crit Rating