Gunslinger Build (Lv. 10-200)

i was thinking today, which skills i would get with my 1st 3 points as corsair, and i was wondering about these sets of skills:

1 boost 1 BS 1 torpedo - how effective is training with 1 BS 1 torpedo? (BS should have almost no HP..)
1 boost 1 BS 1 octopi - is octopi really useful for anything? it's like an extra attack or two and having another octo out. the problem is, it will only last for a couple of levels, or i didn't know and you un-mount to octo from time to time.
1 boost 1 octopi 1 air strike - same question on octopi, and is air strike useful when training with BS and cannon\level 1 torp
(in here see also boost\BS\AS)
1 boost, 1 doesn't matter, 1 rapid fire - dojo build. rapid fire level 1 to go far in the dojo and get black belt. or if dojo training (pap, mu gong?) is effective.

long story short: how useful are octopi 1, air strike 1, rapid fire 1 and BS\torp combo.

Honestly they all suck at level 1. For your first 3 points, I'd recommend 1 ship 2 cannon then put your points into cannon until you get it to level 11, which would be level 123. At 124, put a point into boost and 1 into octo or AS and then keep putting points into cannon till it gets to 21. Getting cannon to 11 is crucial, since that's when you start hitting 4 times and your damage will go way way up. And you get another big boost from 20->21 so you'll want to get that real soon too.