Regarding Lizzie's ritual: you realise that a Force 11 ritual means you have to beat a 22 dice pool?
On the plus side, the Lodge doesn't need to be permanent, you can just use 11 reagents, and you have a Force 11 lodge for 11 hours.
You'll spend so many reagents to lower the drain anyway that 11 more or less doesn't change much...
And note that you do not know in advance how much drain you'll take: the drain value is equal to twice the number of hits on the defense roll (so on average, 14P)
So if you expect trouble and go for 10 successes from the ritual (There's 16.31% chances to get 10 or more successes on 22d), so 20P, to reduce it to 2P you'd have to pay 18 x 11 = 196 reagents (so a bit less than 4000 nuyens).
And of course, the main problem is that you have to succeed in casting that ritual. Others can help, but Sian and Glinda are at -2d on their ritual spellcasting roll (not the same tradition) and if I followed correctly, Corbin is an adept so no use here. If they even have ritual spellcasting.
I know numbers shouldn't be that important, but I find it fun to look at the stats in cases like that. So...
In any case, you'd only be able to get a number of dice bonus equal to you ritual spellcasting level, so 2 at the moment.
You'd have at most a pool of 9d6 (Magic 5 + Ritual Spellcasting 2 + Teamwork 2), so 14.33% chances of success only if you post-edge (and pre-edging is not good either, 16.27% chances). Probably best to increase that...
If you have 6, and Glinda + Sian roll decently (probably more thanks to a high Magic rating than proficiency in ritual spellcasting given their particularities...), you'd get +6, for a total of 17d (Magic 5 + Ritual Spellcasting 6 + Teamwork 6)
Now, pre-edging gets you 50.87% chances to succeed, but post-edging you reach 70.64% chances.
If you want to play with the numbers, you can go there:
http://anydice.com/program/a42cJust put the values you want in Magic / Skill / Edge / Force and calculate. Use the Table / "At least" visualisation, it's the easiest to understand, and you want at least 1 net hit.
In any case, limit is not really an issue: even without taking the BGC into account (probably a +1 or +2), you don't have a problem with the limit, since it would be 13 (11 + 2 from teamwork), and there's only a 1.16% chance that the ritual goes that high.
tl;dr: Increase your ritual spellcasting before casting the ritual ^^