lower it!
i live in speed bump central and mines okay
coilovers would be bad idea but 40mm lowering springs are fine, especially the eibach sportline or pro kit as the ride is actually slightly better than standard tjet springs anyway but with the much better handling
aslong as you drive carefully itll be fine, theyre progressive so the more force applied to them i.e fast hard cornering the more they firm up but most of the time its an acceptable ride, people have had them on for a couple years now with no issues with the shocks or anything!
the ones you want for the tjet are actually the diesel springs btw