How is 210 MP for such a crappy unit cheap? Pioneers are 200 MP and way better between their MP40s and flamethrowers. I don't think any unit dies faster than Royal Engineers. I'd take Rear Echeleons over Royal Engineers anyday.
NO unit dies faster than sappers?
Well there's combat engies (RA of 1, models capped at 4 no rec acc buffs at all ever)
Pios (see above)
RE flip in and out of being more durable depending on timing but end up squishier.
Partisans end up slightly more durable than unvetted 4 man sappers
AT partisans get ALMOST as durable as vetted 4 man sappers
Grens are less durable than 4 man sappers at equal vet
Saying snipers feels like cheating but them too
Any 4 man squad potentially really
Vet 5 volks are actually less durable than vet 3 sappers as well
Someone who is better with numbers than me could do up some EHP calculations but for now you'll have to settle with someone better at numbers than you is saying you are wrong.