A few things to consider here.Why? Indra has 90 Controls - even if we take all 3 that's still massive (if the difficulty is related to Control numbers), and they'll be re-invaded in upcoming weeks
(Asking because I don't understand why we're still looking at multiple Titans rather than concentrating on one at a time now they can be beaten)
The first thing: weekly tick wipes out 30% of progress in controls. Apart from Arietis Sector BQ-P b5-2, nothing at Leigong has any significant progress to lose. Or to put it another way, any progress added to them now is likely to be completely wiped out (disregarding sample stockpiling, since that doesn't actually "add" anything until they're handed in). But the control systems at Indra only each need 20% before Thursday which would be easily achievable given their greater distance from the maelstrom.
The second thing: These systems are the outermost controls, having had their progress boosted (to the maximum of 80%) by spire activity. Clearing them will change the outermost selection to new systems. This method is the most effective way to clear systems, because it pushes a large group all at the same time.
It basically boils down to the hard work has already been done (getting them to 80%), now is the perfect time in the week to finish them off rather than let them languish and get pushed back down when the tick happens.