Is this right? Math versus reality.

I know nobody can tell me if this is exactly right but since you guys have a better understanding of skill points, you may know if I'm too lost or making a mistake.

I want to create a full str glaive with this build:
Heuksal:90
Fire:90
Lightning:90
Cold:30

Using a character builder, I got that I require 436.352 sp to take everything on those masteries to the max.

Then taking a look at a 'lvl versus gap' chart it seems I can get 418.168 from level 0 to 70 with a lvl7 gap.

The sp at level 70 with a lvl0 gap is 4820, if I consider I'll get 4820 from lvl71 to lvl90 with a lvl0 gap then I have 96.400 more sp.

In other words 436.352 (lvl7gap 1>70) + 96.400 (lvl0gap 71>90) = 514.565 sp.

That's about 78.213 more than what I need but, I have to consider a few things, on my favor is that there are some skill I won't be using and the sp from lvl70 to 90 is more than what I estimated, against me are the quest that help me level faster without giving me sp.

I know this is only math so the big question comes here.

Is it too hard to keep a lvl7 gap up to 70?

Thanks in advance and sorry to make you read so much.

Yes it will take some time to do that, but your best bet to farm that much SP would be taxi for about a month to get about 250k sp saved roughly, then recalculate what you will need from there. Trying to farm for that long for that much SP will drive you up the wall, no lie, botting obviously will help you out alot so be sure and do that if you cannot afford a taxi.

Thank for your recommendation.

7 gap from 1-70 is just ridiculous. You will never level and really, you dont need that much at all.

If you realyl wanted too, id say a 3 or 4 gap all the way through would give you sufficient SP. I would just farm sp at like lvl 10-30 and get like 100-200k then move on with a 0 gap and occassionally like a 3 or 4 gap if you find you're starting to run too low. Besides, im sure youll get tired of playing before you hit 90 anyways. From lvl 70-90 you need to nearly double the amount of SP youve gained so yeah. Being fully farmed for 70 and even 80 for that matter is fairly simple. Just depends on how long you plan on playing