War elephants were buffed time ago, Battle Elephants for Burmese, Malay, and Vietnamese werea also improved (with Khmer BEs nerfed because being too OP long time ago, and the Burmese ones with the questionable buff from Rajas days), but the other elephant UUs (Ele archers and Ballista eles) are just left behind.
So if you watch almost every high level game with those civs in 1v1, for Indians is almost always the game with Hussar and Cavalry Archer, and for Khmer lol, the player only go for Hussar and Scorpion, crazy army comp though, so at that point why ever you will go for the elephant units, is sad because those barely are pratcical to use, yet too expensive and with soo many (and Cheap) counters.
My suggestions for those are:
Ballista Elephant now affected by Battle elephant speed bonus, this not only fits thematically, but also gives them a distinction from other slow but with high HP ranged units.
Ballista Elephant (Standard and Elite) Attack increased from 8 to 10 and 9 to 12, this could, at least, puts their damage on par with proper siege weapons (cmon, is a freaking Ballista).
Food cost decreased to 95, so more affordable at least.
For Elephant Archer
Sultans also allows the Elephant Archer to be trained at the archery range, this, could be the best buff for the unit, the main drawback is the unit needs castle to be massed properly, archer units are only effective when massed, elephant archers simply don’t get that, but being able to be trained outside of castles will give the player better accesibility to the unit, and thus be used more. Also, Indians lack proper tools vs Archer civs because their main tank unit is also hard to use. and it will gives Indians a much, much better identity as a civ that uses elephants effectively, and in Imperial, it could make the Elephant Archer+Hussar army pretty interesting, instead of the Hussar+Heavy cav archer, which more than one civ already does but even better, and get rid a bit of the one trick Strong Camel civ identity, which again, other civs already get.
Elite Elephant Archer +1 range, I mean, Elite War Wagon, which is cheaper (costs wood, with a discount lol) and faster, is almost better, in every way, than ele archers, also gets armor upgrades for free, but the elite elephant archer has worse attack and range, fair…
Food Cost reduced to 95F aswell.
So those are my points, not sure what more left.