I personally would worry about a struggle between the T and any other arachnid. You dont want the 'food' spider to fang the T and cause an injury. For that reason, its safer to stick to crix, roaches, etc.
if you feed your t jumpers, be sure it's dark. if you try it while lights are on, the jumper can pawn your T. They have excellent sight and they are versatile. and be sure jumper is at least 1/2 of your T.
Imho, dont bother with jumpies as a T food. better safe than sorry.
i think a mouse would be more dangerous to a T than a jumping spider in more ways than one but hey.... Id never feed any predator to another because the one i wanted to be the food may not cooperate . I also would never feed vertibrates to a T especially rodents ...have you seen the choppers on them tings? not to mention calcium MAY ba a casue of bad molts on blondis and other large rodent fed Ts