As it stands, Regulus is the only demigod who has enough range to attack towers without being hit by their attack, as far as I know. I don't think he can do this right away, but once he puts just 1 point into sniper scope, he's safe. This is an enormous advantage that no demigod should have.
A major component of the strategic part of this game is destroying the enemy towers, while defending your own. To attack their towers, the other demigods often need to gang up on them, and negate the tower damage through either healing or shields. They can also use creeps and minions to cover them so the tower attacks them instead, avoiding the powerful 250 damage hit, while they slowly chip its health's away. Regulus can just put 1 point in sniper scope, and destroy them on his own. It's also way too powerful in fortress maps, since sometimes fortresses are in places where they're easy to attack.
The simplest solution is to make it so Regulus's Sniper Scope only affect his attack range when he's attacking living units. If he wants to attack a building, ALL range buffs are negated and he must get within his base range to attack them.
Now I know that when you post a perfectly legimiate claim for a nerf on a forum, there will always be some tards who will always tell you to just counter it, no matter what you post, so the rest of this post will just counter their arguments before they come up.
Counter this? Um wtf no. Am I supposed to just drop whatever I'm doing and waste time running to the defenseless tower being attacked to try to get him to run away, which might not even work?(he might have backup, or planted mines nearby) Am I supposed to waste a teleport scroll to get there? I'm not going to try to follow the Regulus around to prevent him attacking towers, or just camp the tower.
Some will just say 'well Regulus is all about range'. His range is already powerful enough when attacking demigods and creeps. His mines are borderline OP, his snipe is extremely annoying, and his other skills are powerful enough. His relatively low health does not justify those and being able to hit towers safely. Not at all. He's the closest thing this game has to an Easy Mode DG.
Some will say that when he's attacking towers, he's not getting xp. Not true. Many towers have creeps that go by near them. He can just plant mines in their path, get several kills, get his crossbow to quickly finish off those that didn't die and go back to attacking the tower. The tower doesn't recharge that fast so even if you get him to run, he'll come back and finish it off with his high attack speed. So what if he's not capturing flags? Everyone knows that killing certain towers opens the way to cap flags that would have been dangerous to attempt to cap before.
So yeah, for the TLDR crowd, the suggestion is to make it so Sniper Scope, and any other range buffs do not affect Regulus's attack when he's attacking towers.