How do I use the entire W row for dumb characters like ゐゑ to be converted by default without selecting them? ゐ゙ゑ゙ヸヹ I need them to type Tewi

Keyboard tricks thread?

For anyone who does not know
si　＝　し
tu　＝　つ
etc.

thi　＝　てぃ
dhu　＝　でゅ
whe　＝　うぇ
etc.

xtu　＝　っ
ltu　＝　っ
xi　＝　ぃ
lo　＝　ぉ
etc. x and l are fine