Cowruns with no HR drops - worth it?

I personally like running Trav solo for high runes. I hear cows are good, but I'm lazy and hate running around to create the portal to cows. Trav is very close and fast. Just need to be geared for it, but you also get a lot of Gold, gems, jewels, rings and ammy's. I haven't gotten any note worth unique yet.

So far I've got 2 Jah, Sur, Lo and Gul. A decent amount of mid runes like Lem, Pul, Um and even Mal.

I gamble coronets from all the Gold and sometimes you can trade decent rolls for an Ist or two. Also, have the chance to get a Griffon. Small chance, but still a chance.

For better item drops, I'm trying out Chaos now since it's very easy to get to and a level 85 area with a boss. I hear a lot of folks with good rune drops too, but I haven't got anything above a Ko yet.

Good luck everyone!

I have found multiple Vex Sur Lo Ohm and Jah runes in cows then had a super long drought of like a couple Pul rune but sold bases for higher runes. Then after like 250 runs of nothing Ber twice in two days. Just grind through the bad RNG