I don't know if the logic is right or wrong but "nothing is given if it is not received" made me laugh because it sounds like it's one step away from becoming a Yoda quote
Also, nobody talking about enslave Ng its super oppressive atm..7 seizes while bombarding you with hefty helge and random assassinates and treasons and if there's anything left on your board after that it's getting yenvo'ed or Vincent(ed)
Just a note, and im not implying you didnt know this already, but i only learned it recently, and maybe many others dont know this yet, so here it is:
An Enslave 6 deck CAN NOT run Yen's Invo.
I did a deck similar to the one you describe, with Hefty Helge and many seizes, and i tried to put Yen Invo but its impossible, because an enslave 6 deck must have 12 tactics, Yen's Invo is not a tactic, and there's a 13 minimum units, so all specials in such decks must be tactics.
So if you're facing enslave 6, remember, there is no Invo (or lacerate or Heatwave, or other non-tactic specials).