I went through a ton of bushing madness on my indys and eventually came all the way back around to stock indy orange bushings. I'm 6'4", 195 pounds and like my trucks medium-loose, I want them to have a nice carve but be stable when setting up for tricks. I'm definitely heavier than a lot of people, so figured I needed harder bushings. I tried:
-Bones Hard - Way too hard, didn't ride for longer than a couple sessions
-DohDohs Red - Felt really good, actually ran these for a while until the top bushing completely exploded. Even rotated the top bushing a couple of times to keep them going
-Indy Black 94a hard standard cylinder: again, felt pretty good until the top bushing exploded. I also ran the Black barrel bushing with an orange top bushing for a bit. Rode ok and looked halloween-y which was fun
Indy Blue 92a Medium Hard conical: Rode these the longest, they actually felt harder than the blacks after a while. As other people have pointed out, the Blue bushings definitely feel harder than some of the "softer" bushings. They're still in good shape after 6+ months of skating
I hit the axle on my Indy Forged Hollows so I moved them to my cruiser and I got a set of Indy Ti's for christmas. The secret for me was committing to breaking in the stock bushings properly. I've always been too impatient. My process was:
-Installed the trucks and didn't touch the kingpin bolt, left it stock.
-I skated the trucks like that for 2 weeks, maybe 5-6 sessions where I specifically rode my board forward and backwards, and nothing too intense. Carves, basic mini ramp runs, frontside and backside 50-50s.
-Towards the end of the break in session, I started throwing in some frontside and backside slappies, both forward and backwards.
After that, I tightened the kingpin nut ~1/2 a turn and found my ideal tightness pretty quickly. I've been running these trucks about 6 weeks now and they feel perfect. My board does have a slight turn still, but nothing extreme where it messes with me. I did notice a little crack on one of the upper bushings were the washer is hitting it on deep turns, but hopefully they hold up.