Haven't seen scissor jacks in use on a class C, so I can't help there, should be some other iRV2 members along with info , on there , leveling and stabilizing ideas.
JMHO. I don't think scissor jacks would be heavy enough to do the job. Most trailers that use those jacks are under 10,000 lbs.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.