Can you please make Sona more cost effective

With the pace of the game having gotten into overdrive; many champions that where amazing in the late game, due to being multi item dependent, are now simply not stacking up in the early to mid game. One of these champions in Sona. Now i love the character to death, but damn if she isn't one of the slowest champions to hit a power spike. Remember that this is a champion that has no pre-6 hard CC, is one of the slowest (low movement speed) champions in the game, and only has one offensive ability to do damage with. This is not to say that she doesn't have an amazing late game power level what with her built in 25-40% CDR on top of what she can get off items. But this is kind of the issue, Sona is so item dependent in the early game. Most champions don't really hit a power spike till they get their first big item, i get that. on the other hand is often on the back foot until she can cobble together 3-4 items. Let me break that down, you need at least 35% cdr to really start slinging spells fast enough to keep up with the rest of the roster, to keep up your mana base (what with all those spells you're throwing) you also need something around 200% mana regen. BUT even with all that you will often run out of mana because your pool simply isn't large enough to sustain the 12-30 spells cast per minute you need to be outputting to keep your allies healed up, keep your team moving fast, and output half decent damage. So that's probably 2-3 items for the CDR, another item on top of that to get the mana regen, and one more item to get the mana pool you need to stay in a prolonged fight. Bare bones you are looking at approx 5K to get everything and another 2-3K to upgrade base level items like into and/or .

TL:DR: Sona needs about 5-7k gold spent on 4 items + her passive CDR before she finally stops casting too slow or running oom half way through a fight.

(items assumed you buy bare minimum are + + + . )