Seriously HOW you made your base this big? How you get so much height in it??? Even though I use open sky and remove every floor I can't even make a full jump in it. You have the height of two bases
An alternative I'd suggest: A flat damage boost for snipes that scales on +ToHit. That allows sets which currently benefit from frequent or permanent fast-snipe (Looking at you, Devices) to keep their edge without needing to introduce RNG.
An alternative I'd suggest: Make Instant Snipe being activated by pressing the ability twice and Slow Snipe by pressing it once and been away from combat for 3 secs
That's a VERY LONG TIME !!! What's the point of having a slow snipe and wait for 15 seconds for it? It should be 3-5 secs ! It will create many and different strategies for every AT to use in combat...