Heroic Bronze is hard-ish for a Bronze but easier than any non-trivial Silver. I don't think you can realistically bag Heroic Silver without bagging at least one skill-based Gold. Heroic Gold is well into Platinum difficulty, Heroic Platinum is harder to get than some of the Diamond badges, and Heroic Diamond may well be the hardest physically possible badge in the game.
Technician Bronze and Technician Silver are pretty much trivial. Technician Gold is a bit tedious, since you need at least one nano pack. Technician Platinum is very tedious, since you need a wide assortment of exotic packs. Technician Diamond is the easiest Diamond badge, since you can get it simply by grinding on HNTR. Not quick, mind you, just easy (all you need is luck and some purely informational spoilers).
Armorer Diamond requires a bit more skill, since getting some of the exotics/uniques require you to do vaguely challenging things, but (again) is mostly just a luck-based grind.