Nothing beats a good triangle. I use the water drop test to sort them into "Yes" "Maybe" and "Toss it in the trash" It works! When dropped into about four inches of water, If it drops fast and hard, Yes it is a good tip. if it drops pretty darn fast then maybe it's a good tip. If it flops a bit and is slower to fall, I just toss it in the trash. After that, I look for a tight consistent pattern on the glue side and begin the fine tuning from there.It sucks to have to do that since it's a pain in the ass, but you can't beat a "good" Triangle tip. so it is worth the effort.
Based on my personal experience about half a box are in the Yes category and twenty five percent hit the trash. It's a great tip if you get a good one and the lets face it, the price is right. I do very careful prep then use loctite professional super glue. A few thousand and counting not one tip has come off. I used to use epoxy and it worked just fine though much more effort and much slower, I have no reason to do that anymore. I do think prep is the larger part of success.