My personal opinion ... I wouldn't start with any double bait rigs. There's just too much hardware on the "pre-rigged" setups, IMHO.
Whether you're going to be using jigs or hook/sinker rig for your Spider Rigging .... the simplest setup will be less cumbersome. I'm fairly new to the spider rigging/ jig pushing styles of fishing, myself ... and believe me when I say you REALLY don't want a bunch of double rigs hanging out there if/when you run into a brush pile you didn't know was there :banghead :Rofl
I wouldn't start with anything lighter than 3/8oz for your trolling weight. You probably already have a selection of jigs, hooks, swivels or clips, plastic beads, & line of a smaller pound test than the main lines on your spider rigging outfits ... so a trolling weight would be all you need. Your choice of "styles" for those trolling weights, whether they be egg sinkers, worm slip sinkers, or either style of the torpedo shaped in-line trolling weights (slip sinker style or with a metal tie eye loop on each end).
And if you don't already have a supply of trolling weights ... I'd compare prices between store brand bags of them and Crawdad's Fishing Tackle (
Fishing Weights ) and there may even be some site members that pour lead sinkers.
And if you rig your trolling weight on your main line, and use a lighter pound test leader line ... you won't be losing very many trolling weights from getting snagged & having to break off. All you will usually lose is your jig or hook. That's why I keep a selection of pre-rigged jigheads on leaders, wrapped around a section of pool noodle ... so I can quickly take the busted leader off & slip on another one, and be back fishing with that rod in less than a minute.
... cp :kewl