Well, before this data sheet was launcehd, most people claimed they've got SR girls by feeding 1 RGacha at a time, and faster than by feeding x3 R Gacha at a time. (or, at least, by spending less tickets to get one)

According to what you say, 3 Rgacha gives x3 better chance than 1 Rgacha, which, for me, who as awful at maths, seems to be logical, and should mean that 10 Rgacha should give at least 10% chance...
I can't get it right, but i guess it really doesn't matter if you feed her 10 times with one ticket or 1 time with 10 tickets (or any other number).
If i am wrong here, then the more tickets you spend at a time - the more is your chance, so the less tries you should, technically, make to get the SR girl.
But anyway, noone yet tried x10 R Gacha a t a time for enough times to say if it really gives you SR girls often.
Also, i have noticed, that it could be not the "points value" what determines which rewards you'll get, but rather their "rarity" or even specific items have chance to return other specific items.
Like, Gacha (R gacha) tickets means you want to say, "Kurito, i want to roll your gacha for girls", and that works like N Gacha - you can get N girl with a high rate, R girl with lower rate, and have a tiny chance to get SR girl. If you add some pink borderline items, like candies, N gacha or N WC, you kinda hint her that you want to get a cheap N (pink) card in return. If you add R WC, or, say, Peronamin, which will normally let you roll that Exploring/SEG Search or GHQ and get R and SR girls at Chance Times several times for that STA you get from that Peronamin, or Pudding, with which you can get wdown a SEG / Focus Boss and get at least a R or SR Wild Card, you will most likely get said rewards (valueable wild cards, namin or puddings - just like you get them from SEGs/EGs/Silver/Gold cases, GHQ)
I also suggest that adding SR WC (1, 3 or 5) to R Gacha tickets might also hint Kurito that you want a SR girl reward, and the more R Gacha you give her - the more "rolls" of her Gacha you kinda ask her to make (so higher is the chance that one of them will give an SR girl) and since so rpicy and hard to get Ex Wilds still don't return SR girls, i suggest that feeding them to Kurito either means you are so high-level, os you can spam them aplenty, and therefore only need more consumables to boost your insane rankings during the Events, or that you are vice versa, a lowbie that has nothing to do with those Ex Wilds so far, and don't know what they are for and their price, and rather need more consumables to play more Exploring or something.
At least my theory sounds simple to come across by yourself to if you are an average or newbie player who don't have access to such datasheats and Wikis with statistics and point values, and explains why adding more cheap items to R Gacha doesn't improve rewards much, and why insane points value offerings return only consumables and no limited girls.
I would really appreciate if someone with shitton of extra EX wilds and SR WC's could check my theory by spending, say, around 100 Ex wilds for Kurito, check for R gacha + SR Wilds and so on. This is a pricy solution, but if mt theory is correct, spending even a few Rgacha x1 + SR WC5 x1, or even EX WC x1 or EX WC x1 + any SR WC x1 would be much better than spending a shitton of R gacha alone.