How high is your dot's vision?
The higher your vision the more effective points into jumping will be.
Jumping definitely helps a lot with PD's, and I assume it plays a decent roll in INT's... but jumping is the main attribute concerned with PD's... along with of course vision to have enough time to get to the right spot, and speed and agility to get your dot to where it needs to be quick enough... but once your in the right spot jumping is the most effective attribute to actually make the PD... as for INT's... I'd assume STR, CAT, AGI, VIS, JUM, and CON all play a roll.
If your dot isn't focused on forcing fumbles and tackling on anything other than wrap up, then I think you can get away with 60 Tackling / 70 Jumping, especially if you get a %make tackle piece. I've never seen an open safety/lb build with 70 jumping, but if you're focused on coverage I think this might be a great idea.