Neither the Steed Stone nor the Conditioning perk affect detection of players wearing Heavy armor. The noise armor makes is based on the actual armor weight values not the modified armor weight values which is why wearing light armor will always be better for successful sneaking than wearing heavy armor. The only way to negate the louder noise that armor makes is by using the Muffle enchantment on the boots or the Muffle spell because they have a reduce noise multiplier with a magnitude of 1.0 (100%).If you're set on wearing heavy armor and sneaking, I'd recommend starting with the Steed Stone, which gives an extra 100 units to your carrying capacity, removes the speed penalty from wearing armor, and makes worn armor weigh nothing. Otherwise, you'll have a hard time raising your Sneak skill...
It's 15% but the thing about The Lovers Stone is that the bonus is the same as the Lover's Comfort bonus you get from sleeping with your spouse so it wont stack with any resting bonuses. Unless you're a Lycan you're only getting a 15% bonus as opposed to the 35% bonus you could be getting from one of the Guardian Stones combined with the Lover's Comfort bonus.Be an argonian. Go for the lover stone in markarth, all skills raise 15% fast (or mabey its 10) . And 2x1h is fine for sneak, but i recomend either two daggers or a 1h weapon in your left hand and a dagger in your right
The noise armor makes is based on the actual armor weight values not the modified armor weight values