It's not bad, but in my opinion it can be improved even more.
Hypercharging just before an instant hot shot is still slightly risky, but if you're getting 7 charged shots then good for you and you don't have to change it. Just saying that the timer is really very tight and sometimes even that 1s of deadtime between you activating hypercharge, and putting yourself into combat with hot shot can be the difference between your turret getting a 7th shot, or the hypercharge buff falling off just before it happens.
If you're doing an opener like this where you fire split/slug shot early on before wildfire is applied, ideally you'd want your first weaponskill inside wildfire to be a clean shot. This lets you do a triple clean wildfire (3 123 123 or 3 121 323) that is 20 potency more than the triple slug wildfire you're doing (23 121 32), and if you're taking the trouble to setup split/slug shot early on, you may as well reap the benefits by starting with clean. If for some reason you're in a hurry to get to wildfire and don't want to spend 4 GCDs instead of 3 setting it up, it's better to do away with the split shot and fire an unprocced clean shot.
One of the issues with popping bfb/he/raging that early is that due to their duration only being 20s, they'll fall off before the end of wildfire and won't cover it completely. If you weave them later in the setup sequence, as close to the start of wildfire as possible, you'll ensure they'll cover all your weaponskills inside wildfire for maximum dps gains.
Something like this is what I would recommend: http://ffxivrotations.com/i5y
You can see it's very similar, you setup the wildfire by firing hot/lead/split/slug while weaving buffs. You can see that the buffs are used as late as possible (but still before important things like lead shot of course) so they have full coverage over the wildfire period. Hypercharge is also used safely only after combat has started and you have hit the boss (not mandatory as I explained above, but just safer). As shown, the second last GCD before the GCD you use wildfire on is the earliest you can pop buffs and still have them cover the entire wildfire sequence. If you pop them any earlier than that, they will fall off before the last weaponskill.