Should I run a heavier rear tire?

I sliced the EXO casing on the DHR that came on my bike really early last season. I Tried a pair of free used Continental Mountain Kings with the Apex protection but tore one almost right away. I got a free brand new one and once I got the pressures set right for me (20 f, 21 r) they worked okay but they wobbled and wore thin on the sidewalls rapidly. Now I run Snakeskin Schwalbe Hans Dampfs and I couldn’t be happier (19 f, 20 r) I’m 150, maybe 155 since covid.:grinning: