I'd be interested in people's thoughts about the Lions deploying a 'big 6' for this tour? I think its been mentioned a few times but mostly offhandedly and I'm after reading an article that got me thinking about it again. Fair warning this might ramble, as I'm trying to figure out my own thoughts on the matter.
Obviously SA have had great success playing PSDT (6'6" 120kg) on the blindside and England have had more...mixed success with playing Lawes there. Of course there is the argument that there's no point trying to beat SA at their own game which definitely has its merits.. However, I do have some concerns about the quality of the blindesides available to us. That is at least partially because my ideal 6 is in the mould of a Ferris (6'4" 112kg) or Kaino (6'5" 110kg). That's not to say I don't think the available options are good players, most of the name thrown about are definitely test match quality, I just feel a lot of them are more openside/blindside hybrids. I'm also probably influenced that knowing what we know now my starting 7 and 8 would be Curry and Vunipola. Against SA good set piece is vital and I think the third backrower has to be good in the lineout. Underhill doesn't have that ability to my knowledge and I don't particularly like the balance with any of O'Mahony, Ritchie or Tipuric.
If we're defining the 'big 6' as someone with the size of a secondrow and the athleticism of a backrower then Itoje is the obvious frontrunner to my mind even if it's not the case in Eddie Jones'. He's obviously got the ability at the breakdown, in the lineout and in defence and I think he's an underrated carrier, especially as he would likely be freed up to carry a bit wider than usual.
Where it would get tricky would be if you were planning this as a definite tactic rather than just an option who could you play in place of Itoje (6'5" 115kg) if he was unavailable for the position. In terms of players that have played internationally at both secondrow and blindeside for any of the Lions nations, Lawes (6'6" 111kg), Henderson (6'6" 117kg) and Beirne (6'6" 113kg) are the ones that come to mind (maybe Kruis as well?). Certainly the prevailing opinion of English fans on this board seems to be that Lawes shouldn't be played at 6 but I do think he was growing into the position as the 6N progressed. Henderson due to necessity hasn't played there in yonks which is a bit of a pity. He's a infuriatingly inconsistent which is a pity as there's a lot of obvious talent there. Gatland did seem to get the best out of him on the last Lions tour. I question if he still has the pace he had when he first burst onto the scene. Part of me would love to see him tried there in a warm up game but given he's unlikely to play there for club or country before the Lions he's pretty much a no go. Beirne would have been a borderline at best tourist before his injury and since rightfully no one has included him. I certainly wouldn't want him to start at secondrow against SA, however I do think there is merit to considering him as a blindside but it would be hugely dependent on an upcoming season which is not a great think to be relying on at the moment. He does have a lot of attributes for a modern blindside. He's an excellent poacher, a very good lineout defender and very comfortable in the wider channels. I really do think blindside is his best position, unfortunately he picked the wrong province to play for if he wanted to wear 6. I have some hope that the signing of Snyman for Munster and the potential emergence of Ahern might see Beirne shifted to 6 and O'Mahony to 7.
I mentioned in the OP that Ryan Baird (6'6" 103kg, definitely heavier than that now, that was weight upon entering the academy) could be a bolter for this role, he has the athletic traits you like to see ( did not want that to embed, and it's meant to start at 4:48) but more than anyone really would have needed a full season to be in with a chance so he's a non-runner.
Stepping away from the uniform 'big 6' if you want a more physical, ball carrying option who's good in the lineout there's three number 8's at Leinster with experience at blindside in Conan, Doris and Deegan. The first two being more likely than the last to be in with any shout. I realise I've named four Leinstermen there but I'm not championing them (Conan and Doris are the only ones with any realistic chance) I'm just very familiar with them and they exemplify a lot of the qualities I'm talking about. I'm sure there's a number of players across the other nations who check a similar number of boxes in the style I want.
So it would appear from my analysis that Itoje is the only realistic option if we want to go this route for the Lions so it should only be an option and not our plan. I appreciate I've named a lot of players so it's totally fair to talk about them and why I'm wrong about what they can or cannot do but I would also appreciate your opinions about whether I'm right that we at least need a more physical six even if we don't go with this 'new' fad (secondrow-blindside hybrids are hardly new) or should we go with dual opensides or a more rangy option.
Disclaimer, like most of you it's been a minute since I've watched a full game so my picture of players is in full off-season mode and more hazy than usual.