Regular blasters are just fine too TBH. I use washed Blaster .30s since they are cheaper than devils and the local shop stocks them more often- I cut a sample of 10 apart and none had any air bubbles internally. Very few have yet casting nipples and improper production.
Madbulls are dodgy IMO. For the price you pay quality is pretty bad- bubbles up the arse,fair amount of casting nipples too.