Hey there!
A few years ago I had TS3 which was the best beater featherweight in the country for a couple years a so. That was nylon bulkheads with hardox outer armour which was a great set up but the nylon ended up shattering/splitting against NST - a horizontal spinner.

The best beater these days seems to be conker 3, alumec bulkheads with hardox outer armour and ti top and bottom I believe. Would say that's the way to go for sure.

Need to get TS4 on the go at somepoint! But time/life gets in the way!