Really why? You can always play the songs gasp every 7 minutes or so which is not a big deal. I would say only lingering song 2 or 3 really.
I somewhat agree about the bard song magic, but the reality is it is not a big investment to max or put points into the bard song magic enhancmeents so shrug why not really unless the character is 100% melee and buffs.
If you can get some gear such as the bauble and abbot gloves you can actually make a warchanter bard or virtuoso bards spell points go a long way and might as well use for healing as the mass cure spells can be pretty potent. My mass cure moderate wounds spell is high 200s (with just maximize) a pop now on rabiez my bard which is plenty for epic elite. I never use cure moderate mass wounds scrolls anymore as they do only about 60 a pop. Cure critical wands are a nice trick on a main tank with high healing amp in a raid ex Lord of Blades Raid (another healing device on cooldown), but otherwise shrug.
A bard can heal a party throughout an entire raid or quest and really a spellsinger's only advantage versus a warchanter is a few more spell points so shrug.