The best-case scenario for RCB will be if the top two or three teams run away with plenty of wins, leaving the rest of the teams fighting for the crumbs. Given the current IPL 2024 standings, it's most likely that those teams will be Rajasthan Royals, Kolkata Knight Riders and Sunrisers.

If we assume that Royals will win four of their remaining six, and KKR and Sunrisers five of their remaining seven, then they will finish on 22, 20 and 20 points respectively. In that case, it is possible that RCB, with 14 points, will finish fourth with the other teams on 12 or fewer points.

Can RCB even make it to No. 3?
Since you - RCB fan - are being rather greedy, let's see.

Let's assume Sunrisers and KKR both suffer a sudden, and acute, slump in form and finish on 12 points - so just one win in the remaining seven matches. Let's also assume that one of the other teams, say Lucknow Super Giants, strike a purple patch and win five of their last six. Then LSG will get to 20, and finish in the top two along with Royals. RCB will then finish third on 14 points, with six teams tied on 12. That scenario is also possible if one of KKR and Sunrisers finish in the top two.

So RCB can make it - mathematically - even if they lose to Sunrisers
Yes. With 12 points - the maximum they can get then - they will still be in contention. In a bizarre points-distribution scenario, it's possible for eight teams to finish on 12 points, fighting for two spots.

However, for any of these scenarios to work for RCB, they will have to start winning, and keep winning, ideally by sizeable margins.