That's a good question. I assumed that the squats & deads in the same workout had a specific reason, but as others have said, I'd never do them in the same session. But I lift heavy and only run about once a week.
Have a think about WHAT you want to develop in terms of strength. When I was running more, I had a persistent hamstring strain (weird because I am almost hyperflexible - hands flat on floor, splits etc). My physio said it was "weak glutes" - but that most people have weak glutes for what we ask of them.
So you could do quite a lot of work on strengthening glutes, but also keeping your hips strong and mobile, as well as working your posterior chain (back). For that lot, think about:
one-legged work: start with body weight & eventually weighted (hold dumbbells in each hand) - you can find good guides to all of these on YouTube.
- box step ups - make sure you put weight on the leg/glute which is stepping up, not the leg on the floor you're pushing off from - try to minimise that pushing off, actually! And try to lower really really slowly. This will kill your glutes.
- Split squats
- glute bridges: you can do with a barbell, or with your legs up on a Pilates ball (much harder in many ways)
- single leg squats - my physio taught me to do them standing on a low box, and hanging on to something for balance. Then just bend the standing knee and get as low as you can! It's hard.
I did all of these in "kneehab" - torn meniscus from running sprints (I was going at 14 kph, so feel it's a badge of honour) so they're good for quads and knees as well.
Also standard barbell squats & deadlifts will strengthen glutes, abs, and posterior chain. But if you're not getting out of breath or finding the top weight a challenge, I"d question what they're doing for you, frankly. If too much weight training feels bad for your running, cut your sessions back to twice a week, and include some conditioning work & some stretching.
I do a lot of Bosu ball balancing on one leg or balance board on one leg and then touching my toes (really good for control, intrinsic muscles in feet, and abs). Or try standing on one leg and closing your eyes. When you can do that, balance with eyes closed and touch your toes. I also do projectile stuff: jumping forwards, backwards, sideways.
Then stretch: typical runners stretches are really important and maybe include the hip stretch here:
Look at the alternating hip rotations at around 3:19 into the vid.