I wanted to look, not just at one specific interaction, but how to break down the value of game elements in general. Trick Shot and specifically it's interaction with the new gas cloud obstacle provides a useful opportunity to look at both how that upgrade derives it's value and why that value might diminish or be removed entirely by the inclusion of gas clouds.
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Let's start out by looking at how Trick Shot derives value in the first place. What has always made this upgrade valuable, if not generally a high pick, has been that it actually presents a mathematical advantage to the attacker when it's active. It gives you an extra attack die when making attacking an obstructed target. Since all current obstructions involve adding a green die to the defender's roll, the natural extension is to look at the relationship between red and green dice. The dice are functionally identical, but with the critical on red dice replaced with a blank on greens resulting in 1 less positive result and the green die being natively weaker than the red one. Assuming both the attacker and defender have the same dice modifications available i.e. a focus, trick shot will present a minor (12.5%) edge to the attacker. This is where Trick Shot has always derived it's core value, that is, you net benefit from firing an obstructed shot vs. and unobstructed one, thus turning a normal negative into a positive.
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To be clear, that benefit is pretty small and Trick Shot has never really been guaranteed because the positioning to get an obstructed shot often doesn't make sense (you probably don't want to point directly at a rock just to get that 12.5% increase). However, in 1.0 Trick Shot was 0 points and in early 2.0 it was 1pt making it a pretty easy inclusion unless you were using that slot for something better (which you probably aren't in 2.0 given how weak that slot is). When Trick Shot went up to 2pts, it's marginal benefit combined with the situational nature was enough to push it out of a lot of lists. It still shows up, but the frequency has gone down likely because if a player isn't building to use Trick Shot and therefore is only randomly benefiting 2, maybe 3, times a game, it's a harder sell.
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Now we have to talk about Gas Clouds. Gas Clouds add a green die to the defender like all the other obstacles, but they also change 1 blank result into an evade. This changes the math a lot and in some very interesting ways. Let's say you shoot at an AGL 2 ship through a Gas Cloud. Average expected results is 1.125 Evades, .75 focuses and 1.125 blanks. With a normal obstacle and a focus token, this is 1.875 evades on average. With a gas cloud, this number bumps all the way up to 2.875, almost an average of a full string. So let's do some quick math on attacks:
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Attack 3 ship firing at an AGL 2 ship and both the attacker and defender have a focus: Through a cloud with Trick Shot, average expected damage is .125, a clean shot with no gas cloud is 1
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So the baseline math has shifted away from favoring the cloud and not by a small amount, but lets ask a more interesting question. If your maneuver puts a gas cloud between you and your target (same target as before, AGL 2 with a focus and same attack 3), but a barrel roll can give you a clear shot, is it better to use you action getting a dice mod or rolling away for a clear shot and just throwing naked dice (assuming basically this is the last turn and you have to kill that ship to win)? Well, we'll use the previous number of .125 expected damage because that hasn't changed. Average expected evades on 2 dice with a focus is 1.25 and average expected damage on an unmodded attack 3 shot is 1.5, so you're still eeking out a minor edge just barrel rolling (.125).
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That's not all though. A common misconception is that, if you roll a hit on your extra die from Trick Shot, that you've at least cancelled out the gas cloud benefit, but this is completely wrong. A gas cloud has 2 effects 1) adds a die 2) changes a die. NOTE: the die being changed doesn't have to be the extra die that was rolled. Both of these effects can add an evade result that wasn't in the roll otherwise. For example, lets say your AGL 2 ship with a focus rolls an evade and a blank on defense, then you notice the attack is obstructed by a gas cloud, so you roll the other die and it turns up a focus. In this instance, the gas cloud has added 2 evades to the roll, first the focus result that you can turn to an evade and second the blank result that it also turns to an evade. You might think the odds of this result are low, but it's actually pretty common. On 2 defense dice, the odds of 1 or more blank results is about 61%, going up to about 75% or so on 3 dice. With a focus making the odds of a naturally positive result a 62.5%, you end up with about a 38% chance that an AGL 2 ship with a focus will add 2 evades to a roll through a gas cloud and a whipping 47.5% on AGL 3. Even if you don't have a focus, the odds of adding 2 positive results with a gas clouds is still about a 23% for 2 dice base and about a 28% for three, so still not as low as you think, roughly 1 in 4 unmodified defense rolls through a cloud will add 2 results.
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For me personally, this is what I would deem a hard counter. Unobstructed shots are just so much better than obstructed shots through gas clouds even with Trick Shot that it removes the primary utility of the upgrade. Considering that it was already a little situational to begin with and the minor points increase in the last update and, if gas clouds become big in the meta, I would have a hard time bothering. Just accept that shots through gas clouds (yours and theirs) are likely missing and set again for next turn instead of wasting the 2pts that could just as easily be spent on an upgrade like Predator.
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It always important when building a list, deck, character, whatever, to break down exactly how much different elements are really giving you in terms of value and also determine whether or not this added value hits the threshold of what you consider useful. for me, the argument that "my odds of this being useful are not 0" is just not strong enough. It has to present an advantage that's both compelling and consistent, but to each his own.