we've spoken about this before; if you're using maker's mark and extending the craft by several steps then you're making the likeliness of getting favorable conditions (good excellent) go up! This favorable condition likeliness goes hand and hand with "whistle while you work". For the cost of 36 cp and 1 step of makers mark ( so u can say its a total of 36+20/18~ 38* CP) you GAMBLE at getting at least 2 condition before your 33 plus rotation is finished.....in RETURN to get the BEST DURABILITY/CP skill (nym. wheel) in game.
Let's do the math on that again for those not convinced. Whistle stacks start at 11, each favorable condition reduces the stack by 1; each time your stack reaches a multiple of 3 (9 stacks or 6 stacks or 3 stacks) you gain access to the ability "satisfaction" (which gives you 15 cp and reduces whistle stack down by 1). So start from 11x whistle stacks, and after 2 favorable conditions your whistle stacks will reduce to 9x stacks which then gives you satisfaction; after using satisfaction you'll get the 15 cp and reduce the whistle stacks to 8x.
Nym. wheel costs 18 cp and returns durability according to the number of stacks remaining on whistle:
whistle stacks--------------------------- return on nym. wheel
11-9x --------------------------- 10 durability
8-4 x --------------------------- 20 durability
3-1x --------------------------- 30 durability
So what is the total cost of whistle & nym. wheel combo? First let's look at the AT LEAST 2 FAVORABLE CONDITIONS cost: you used 36 to activate whistle, u lose one use of flawless Syn. which we'll say cost 2 cp and you gain the 15 cp of satisfaction but potentially lose either another flawless touch for 2 cp or later in game potentially 1 use of steady hand II, 5 cp. So just so we use the worst numbers possible: that is +36 +2 -15 +5 +18 = 46 CP for 20 durability; thats 23cp/10 durability ....the next best skill to that is waste notII at 98CP/40 durability = 24.5 CP/10 dur (mine u thats waste not WITHOUT a SH2 before proc; and WN2 is the most inflexible skill in game).
Second, the Worst case scenario you do not gain the 2 favorable conditions requirement (very rare BUT POSSIBLE) you lose 36 CP, basically a second use of ing2 lost!!
Now let's consider the hassle to using these skills. Whistle, satisfaction, & nym wheel; 3 skills an extension of 3 steps at worst to your rotation and a potential lost of 36 cp (IF THE RARE CASE OF LESS THAN 2 FAVORABLE CONDITIONS OCCURS).
Now the benefits: best CP/durability access, very flexible, potentially extends the craft offering even more chances of favorable conditions, and Whistle @ multiples of 3* adds 50% to all progress skills (ex: rapid syn + 50% = 300% efficiency).
LASTLY if the craft is very important to you that it HQs you can force favorable conditions using Heart of the "Crafter"; cost 250 blue scripts for 10 uses; very cheap; and comes in handy for emergencies.