I've voted a 4 after debating between it and a 3.
Mandrakes are truly astounding for the price you pay and are one of the few sources of a permanent invulnerable save within the codex. Their S4 as base means they stack exceptionally well with power from pain (as they generate wounds without the use of special weapons).
This coupled with infiltrate and fleet makes a turn 1 charge a very real possibility, even if they do not stealth means a unit hiding in cover fairly difficult to shift.
Perhaos the most important aspect is how all these things come together - they are one of the few true hunter-killer units in the codex (and, by extension, the game) which gives them a huge amount of strategic and tactical options that sadly few people will get.
Mandrakes really are one of those units that look nothing special on paper but shine when used, most people will write them off which says more for the sad state of the 40k community in general than mandrakes specifically.
Mandrakes are truly astounding for the price you pay and are one of the few sources of a permanent invulnerable save within the codex. Their S4 as base means they stack exceptionally well with power from pain (as they generate wounds without the use of special weapons).
This coupled with infiltrate and fleet makes a turn 1 charge a very real possibility, even if they do not stealth means a unit hiding in cover fairly difficult to shift.
Perhaos the most important aspect is how all these things come together - they are one of the few true hunter-killer units in the codex (and, by extension, the game) which gives them a huge amount of strategic and tactical options that sadly few people will get.
Mandrakes really are one of those units that look nothing special on paper but shine when used, most people will write them off which says more for the sad state of the 40k community in general than mandrakes specifically.