Pentalaloon and the much stronger CB Quadlava can 3 star almost any max TH9 once you get ~20/20 heroes. The same strategies apply to lower bases with lower heroes. I'm assuming that since you're probably new to LL, you're TH9 so most of this info will be TH9 related.
Bases that are harder to laloon have basic traits. Overlapping maxed ADs, WTs out of range of the ADs, deep queen that you cannot get to with a cold blooded, unlurable CC with a max dragon in it.
The most basic set up that I almost always used (and i recommend my clanmates use most of the time) is 1 golem (30), 4 lavas (120), 4 wizards (16), 2 WB (4), 16 loons (80). That's 250 camp space (220+30), try to use your own golem with a max lava hound in your CC. For spells, I generally say to use 1 zap and 3 rage, though if the walls are covered by splash, I will eliminate 2 WBs, add a wizard and take 1 zap, 1 jump, 2 rage. As you get better, you can get fancier with the comps, but that is just a basic starter comp to CB Quadlava.
As another note to CB, I've been experimenting with creating a value system for each defense (WT/AT/XBow/Tesla and AD) for determining where the more effective place to CB is. I have a sneaky suspicion that if you can get 2-3 WTs + 2 more buildings, it could be more effective than an AD. I don't have enough proof yet though.
The attack plan was made harder by the air sweeper, but I still believe LL variants are the strongest attack. What you want to do is send in your CB (Golem, 4/5 wizards, 2/0 WBs, royals) with the target of getting the queen, an AD and 2 air targeting defenses (WT/AT/Xbow). Zap the clan castle. You then want to target the other ADs in what I call a collapsing spiral motion. You send 2 lavas to the first AD so that the earliest loons will go to the core while the later loons follow around in a circular path to the next AD. As the 1st AD is about to go down, you drop the 3rd lava to target the next AD with some loons behind it, goal being to have them continue the spiral towards the last AD. As the AD is about to die, you send the last lava at the last AD and you send the last 2-4 loons at a remaining WT. An important note is that if your lavas have not popped with the last AD still alive, do not use your rage spells. You will lose the raid if your lavas don't pop because you went through the base too quickly. With the introduction of the sweeper, you want to base your spiral direction based on the least effective path for the sweeper to hit you so that your loons can get behind it easily.
Pentalaloon is another valid strategy, though I feel it is less effective (Note, this could be because I have a lower 3 star rate with it). When I used to pentalaloon or when I help a clan mate plan a pentalaloon, the goal is to lure the CC and use your heroes to kill the CC. Then, using 4 rages, 20 loons and 5 lavas, you attack the base from one half saving 1 lava and 4 loons for the back end. You use the loons and lava to try to get the last WTs. You can also pentalaloon without a lure if you have a zap spell and the queen is free with a suicidal king.
As a shameless self plug, at Reddit Alchemy I do
war recaps featuring a lot of LaLoon attacks. They explain better with pictures of actual bases and you can see actual attacks.
Edit: Source, was a consistent 5-6 star war player at TH9, currently have 2 TH9.5s and have started 3 starring mid to low TH10s.