Chaos orb drop rate and leveling question

I'm level 88 and have pretty much no issue with T15 waystones.

However, in order to progress and get higher item lvl gears, I'll need to do T16+ nodes.

And in order to get those nodes, I'll need to use chaos orb to corrupt the T15 waystones. However, the drop rate of chaos orb is too low to sustain making T16 waystones.

How does everyone else progress in endgame?

Do you guys keep making T16 stoens this way or is there other way to get waystones higher than T15?

Chaos orbs don't corrupt items. You want vaal orbs.

Can buy a few hundred for 1 div through Alva.

You'll also get a fair number of high ilvl items just irradiating maps and adding bosses to them. I could be doing something terribly wrong, but I really only go out of my way to get T16 maps via trade and I use them to run Paradise.

Using the standard tablets that have an implicit modifier that irradiates maps, adds +1 level to all the influenced nodes.
There are also very, very rarely corrupted nodes that when you hover over them, will display an inherent +1 to level. Most don't however.
Combining vaal corruption to turn T15 maps into T16 maps with the two things mentioned above is currently the only way to get to the maximum map level of T18 (Where you have at least SOME chance (even though still very low) of finding your level 20 uncut skill and spirit gems.
Don't get your hopes up.

Yet another thing that was way better in 0.1 :S

Researcher's strongbox drop currency items and you can spec your atlas for them.
Trial of Chaos is quick and easy and gives a lot of Vaal orbs.
Current average rate for Vaal orbs at Alva right now is 7:1ex.

Organised Focus on Atlas on Boss atlas tree makes all Boss maps +1.
Corrupted/Cleansed areas can give +1 rarely.

Top bases require iLvl 75 to drop and most affixes have iLvl of ~78 to roll max with a few exceptions. T16+ isn't required for what you want.