why can bard out damage most of his team while building tank and maybe nashors???

so for the past few games of bard i either have 2nd or 3rd highest dmg dealt to champs as bard, and this feels weird mostly because im used to only having two meeps and only getting out maybe 400 dmg but now holy christ 6-7 meeps worth of slows and damage makes a big difference and even if i lose lane i still end up 1v1ing their adc and my build is and for mastery i take the all mighty bond of stone

im healing my team for slowing/stunning giving them all

how do i post pictures so i can show you the damage im dealing with bard

sorry for the poorly made post but can we actually discuss bard and his chimes dealing metric tons of damage in team fights because the cone gets massive and its apply a monster slow which helps you guys chase or kite and his ult that once you get good with it will save your team ALOT