You Know You Suck At Your Job When...

Don't forget a Lotus Orb!

Purge the purge that the enemy team purged after purging yourself so that you can get infinite purges xD

Btw, of course Riki has to be visible for you to use true sight abilities. The thing is he is supposed to reveal himself often in teamfights; also, it shouldn't be that hard to have a single dust or even sentries and go as a five, so that he will definitelly come up at some point on the area. So if you're a good BH or a good Slardar you should definitelly make it work against Riki, or something is wrong with you (BH also has his own invisibility to help him in this).

Incoming Aghanim's Scepter upgrade for Riki Martin - Makes him immune to true sight.. Kappa..

You are clearly Livin' La Vida Loca if you think that'll ever get put into the game. :p

i think an aghs upgrade for riki would be make him immune to true sight while in smoke cloud

See, now that upgrade makes some sense! I'm old-fashioned and like tying Agh's upgrades to ultimates still, so how about...

Riki is now immune to true-sight for 2 seconds after using Blink Strike (non-stacking buff, use of Blink Strike during the 2 seconds refreshes duration only).

Riki Aghs:

Backstab applies to front as well. Because you can backstab a guy in the front too.

Imo to become immuned to true sight is not really possible now. A self-purging skill is much possible to be applied but like what was said, greave was overall better. Immuned to true sight within smoke? Interesting but you dont want to spend 4200 golds just to hide inside the smoke. Immuned to true sight after blinking? Not viable because the only case you are truly invisible to enemy are when you blink without attacking, because the fade time of permanent invisibility is 2 seconds.