Not really sure what you're going for here. Honestly 2 FF are decently threatening against an elefant thanks to tulips, with or without cmd AEC support
Brits have some pretty good recon/spotting themselves, and their tanks can get better FOW tracking. Brits struggle with a lot of things, but they're pretty good at killing heavy TDs. Especially with an ally distracting it
I have rammed many elefants with t34s just to setup a kill from my brit teammate
Tulips work well against Tigers and King tigers. However, super heavies... unless the sole point is to stun, not really worth the drain.
With a 50% chance to penetrate long range, and Elefant having the Hp it's having, you're better off using tulips to help start a dive to kill the ele, followed by a katyusha or some other salvo of indirects around the elefant (paks, raketen... but also trigger mines) and then you dive. Using tulips and just hammering away at the elefant with the FFs is not really advisable, unless the elefant is completely naked.
Also keep in mind that the reload time for the FF is 6 seconds vet3 (8 vet0). To kill an elefant in a decent team you need to invest much more MP/muni/fuel than ele is worth. Same goes with jagd.
Speaking from experience here as I've helped destroy many-a-heavy TD. It's a cancer, especially on 3v3 maps where it can be easily parked and just hammer away at any tank trying to help secure the VP... without risking some flanks.
Your best bet is to have one ally dominate their lane, to open up the flank and then dive it. Biggest mistake people do with the ele is trying to backpedal it to safety. Mostly it's just better to let it hammer away at tanks (unless it's 6 ally TDs and the ele is completely solo)