Dear god not another of these bloody things.
If you want to go for it, just sounds like a lot of effort for very little payoff.
Though it is nice of you to bring these along. Just, yeah I'm gonna go into some of the reasons why people seem to have instant chagrin with these sorts of "master iconsets".
The people who will seek out iconsets like this are one of three:
A.) Over-ambitious enough to never finish a game.
B.) Too Lazy to make their own custom iconset. In the same vein, too lazy to properly finish their game.
C.) Someone who has the time to take out the icons he wants and credit accordingly.
Of the three above, A and B are not even the main the reasons I and many others have an ingrained hatred of these master iconsets. A and B are also the most common, and have much less chance of crediting the work. Lack of proper credit is the reason most have disdain for these.
Also there's the issue that an iconset of this magnitude will also greatly increase the games size, you will NEVER find a use for all 7000 icons even if you tried, it's a bit of simple math.
States, Weapons, Armors, Items, Skills, you can have just short of a 1000 of each.
So 4995 icons, is still too few for this iconset by a good couple grand.
And you should never need or want that many. Even for large scale over-ambitious games like Beyond reality or Menagerie: Remastered.
Can't speak for BR, but M:R has an iconset like this.
It's a game with 32 weapons, 64 accessories and over 120 items, each of these have unique icons.
Yet the iconset is still accountable, managed and small. This is also including all the states, system icons (the icon for gold and xp for instance). It's 126 kilobytes. Next to nothing. Even in MV scale, it's still barely exceed 180 kb. 320 icons in total.
Up that by 7,000, and you're going to have load time issues with something that should be instant. Let's do some more very rough math, let's say we generously only multiply 180kb by 15. Your iconset is now 2.7 megabytes, the grand majority of that being dead weight.