There really needs to be a drop system for unlucky people like me. It should be if there's a 5% drop chance from a boss if it hasnt dropped it by the 20th drop then its guaranteed to drop it on the 20th drop if it 1% and hasnt dropped it by the 100th drop then its guaranteed to drop it on the 100th drop.
How about a boss that periodically teleports to a different location and attacks from a distance? This would make the speed boosts much more essential since the raiders have to run after him constantly.