Re: ASU on Riki (Not Suggestion)
One of the suggestions, and serious, not a joke, was as above- 0 or 0.01 fade time on level 3 ult with scepter. The idea being you could attack while still invisible like Slark can, or attack and be simply a 'flash', so they know whats going on, but can't fight back. Why? Because even though it might sound overpowered on first thought, it would still be countered just the same by gems and wards and make him even more vulnerable to those threats since he spend 4300 gold on it and gains no attack from it.
Aghanims should always have a very strong effect on DPS role heroes, those like Kunkka, Riki, Sniper- those who aren't really tanks and who don't cast many spells. Its simple logic. Those heroes benefit *much* less from the stats than a caster/tank hero would. For example, Necrolyte has a very weak aghanims upgrade, but its still a moderately viable item on him no matter what people say, simply because it gives him exactly the stats he wants. But for a hero like Riki who desperately needs damage and chasing, but generally doesn't care about his HP/Mana as much, and especially when the upgrade makes him care even less about his HP (with truesight, he's either going to die outright or not take 1 damage with a 0.00 fade time, regardless of his HP). In that case, the upgrade should be very very strong.
Since most heroes with scepter upgrades are those that benefit from the hp/mana a bunch, a lot of the newer ones that go on DPS heroes should be a lot stronger by comparison to balance it out