Lock and Load: The Reassembled Machinist Guide

[Myon88]

Don't be too focused on your wildfire numbers themselves, as they will vary depending on your gear (ilvl), stats (even if same ilvl, do you have too much sks instead of crit?), whether buffs are up (DRG/NIN/AST is around), whether RNG likes you (people only post their 'good' numbers, obviously). As long as you're doing your rotation correctly and see the correct number of weaponskills compiled into wildfire - you should be confident that the number you see is the correct one for your situation.

As for the opener you posted, you should take that hypercharge and stick it between hot shot and lead shot instead - there's a gap there that's going to waste, plus why turn down another 10% buff to lead shot?

You're also doing split, slug, clean after rapid fire which is slightly wasteful, because slug and clean are already instant cast with procs. You want to do split, slug, split instead because split shot will always have a cast time and thus benefit the most from becoming instant (we would do split, split, split if we could, but this would cause the procs they create to overwrite each other which is wasteful).

Sum all this up and you get a modified rotation that looks something like this,

B4B, HE, RS (weakest to strongest, so weakest falls off first)
Hot Shot, Hypercharge
Lead Shot, Reload
Split, Wildfire
Slug, Gauss Round, Reassemble
Clean, Quick Reload, Rapid Fire
Split, Ricochet
Slug, Head Graze
Split, Blank
Clean
Slug

Everything that is bold is in a non-negotiable position in the opener, everything that is not you are free to shuffle around as you like. For most situations, it really doesn't really make a huge difference whether you use stuff like Blank or Gauss Round here or there, which is why some people have slightly different openers.

Obviously though, you still want to use them in a sensible manner - use reassemble only on a clean shot for example, and use the correct amount of ogcds after a weaponskill so that you don't clip your GCD (max 2 after an instant weaponskill, max 1 after a manually casted weaponskill or a rapid fire'd instant weaponskill).

So don't get too caught up in memorizing it literally, you just need to understand why the important skills are where they are, and you can improvise the rest yourself.