Of course, I'm not talking about the player, but I can say for sure: the stalker mech, the rat, his skill increases damage on you, so you will most likely be killed right away, BUT you can use long-range weapons (longram 8, emrifle 6, cryo, javelin 6/ javelin rack 6) or storm rack 6, there will be a good option.
As for Tengu: this is a VERY aggressive and fast mech, his skill does a lot of damage, and with an amber gan 8 or a fragment of gan 6 -8 there will be a machine of evil, I think that tengu is more of a mech to attack
Conclusion: the stalker will be an imba for a long-range nu or medium-range assembly such as a disc launcher, and a tengu for an aggressive game of embar gan 8.