Landing legs are out of the question for Super Heavy anyway. If the engines come that close to the ground, the reflected sound from the ground will tear the engines apart.
The 3 RS-25 (1860 kN each)[1] used for the Space Shuttles had 300,000 Gallons of water output per 41 seconds [2] when it launched. On landing, the Falcon Super Heavy used 5 or so [3] of the Raptor Engines (2750 kN each [4]). I'm making a few assumptions based on Napkin Math, but the parent comment seems about right since the engineering required (and the payload weight lost due to the weight/space requirements of landing feet for the FSH), would be too high to withstand the vibration reflection of landing on solid landing pad.
