Range Editing

So after being busy with college for a while, I decided to come back to editing and finish my map. One of the things I wanted to do was be able to upgrade range by a percentage. I know the game allows modifying it by a specific value through upgrade editor. However I have many units with different ranges using that upgrade, and if that's not bad enough I need to have 2 such range percentage modifying upgrades that stack by %.

So for example if I have the first one do 10% range increase, the second one has 20% increase. Using them both should give a range of (100% x 1.1) x 1.2 = 132% (as opposed to 130% which the current way of stacking would give me).

I know this was a hard thing to do a year ago, but since 1.20 is out now and osme more editing tools for Frozen Throne, I'm wondering if any new methods are available to fix this.

As far as I know, things haven't changed.

Alright then, assuming I have 28 such upgrades per player, with 80 levels each, how much will that slow down the loading time by? Also, it shouldn't cause any lag in-game (since abilities and upgrades are preloaded), right?