OPINION TIME:1. Yes, actually, (Just hope your in a arena with good hazards, or a pit, clamps don't do much damage, unless you replace the plows on this bot with weapons)(https://gametechmods.com/TournamentFiles/botm/nov09/003.PNG)
2. Spike strips can be put on extenders for armor/damage to opponents, like on Event Horizon 2:
(https://gametechmods.com/RA2wiki/images/a/a2/Event_Horizon_2.jpg)
3. No use for that kind of chassis comes to mind, really. Just don't bother and save the chassis weight. Fire axes and hammer heads aren't really too useful, use Razors/Irons instead.