Yuu forgot another idea of lifting...
Both a Ramp and a lift, meaning either a robot will be gping up a ramp and then lifted, or one bot goes up a ramp, and another is lifted using an arm...
There are many fine ideas...be sure you think of as many as you can before you decide what you build nd what strategy you are gonna use.
U could also build your bot witha safe lifting system. Its FIRST, everything is possible here. You may even build a chopper
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My FRC record: 10 Years,FTA (2008-9), 3 Teams(1947,2669,3211).3 RCA, 1 Championship EI(2016), 1 Divisional finalist (2016), 1 Regional winner.
Israeli 2016 Volunteer of the year.