One tip. Your d750 combined with lens are big. So get a big and sturdy one. Dont get one that looks like for compact camera. Also check the tripod weight limit.

First of all, check what is causing the vibration. Is it the head or the tripod? If the tripod does not shake but the head does, then just replace the head. Or you can try weigh down the tripod by hooking/tying up your bags underneath it. It should have a hook underneath since it claim to support 14kg, though probably false advert.

If all fails, then replace the whole tripod but bear in mind, cheap, small or travel tripods probably won't do any better if your camera has one powerful mirror slap. Don't look at overall height based on column length but rather the legs height. Try looking for tripods with hook underneath that can add to better stabilization if needed.

Clip or screw depends on personal preference. Clip is better because you can tell when its locked. A bit hard to tell if using screws and if not screwed tightly will accidentally collapse the legs. However screws are a lot easier to expand the legs.

I personally own a screw tripod and i cant tell you how annoying it is when after collapsing all the legs (for fast picture capture), i keep forgetting to screw them tight, having the tripod almost flip over. Temporary solution is to mark them (like the dots on the lens and mount) on the screw for quick visual check before setting up. Buffalos clips are a joke though so dont go for that one if possible.