Clunking going over bumps

Sway bar end links, or sway bar bushings.

ck struts and ball joins

check sway bar rubber bushing

could be all sorts of different things!
I would lean towards something common(Given the age of your vehicle)
something like strut mounts, or possibly control arm bushings. depending on the loudness of the noise

I have 06 daytona with same problem clunking noise front passinger side Master Mechanic's checked steering and suspension components could not find the source. Problem is that sometimes noise stops then comes back. I will try to find the source myself tomorrow let you know what I find.

These sounds like something is going on underneath the front of your subaru. The usual suspects will be the arm controls, stabilizers even axles, let a mechanic look at it, sounds dangerous. thank you!

Is the clunking form the body reaction to the bumps or is through the transmission. What ever sounds like some rubber is missing. Look at frame to body mounts, spring to frame mounts and anti roll bar mounts, basically anything that isolates something that moves from something that should be solid. On the transmission look at rubber prop couplings and universal spiders along with gearbox and engine mounts. Finally check the shock absorber mounts for wear

the car is aging

there are other bushings and ball joints to make noises at that speed

the top rubber mounts failed for a reason

if i were on that job i would have replaced both gas struts
at the same time....

not much structure to the top strut mounts
see pictures in link
Strut Mount Early Small Chassis Audi Density Line

shock absorber mountings or fixing bolts loose

Take a good look at your front struts. With your hood up, bounce your car and see if you have any movement of the top nut on the strut tower.