Mechanical roller lifters, solid. (Pin oilers?)

any camshaft that does not use EDM lifters or have the bores or bodies modified will primarily receive oil when it's flung up off the rotating assembly. Almost no oil hits them at idle. That's why you have to have some rpms when breaking in a flat tappet. But in terms of the solid race style rollers - it's not they won't see "enough". The solid rollers were developed for race applications where idling is not normally a big part of the program. So if you're putting them in an application that is not what that model was designed for - you need to either accept it and not idle much, plan to inspect or send them back to rebuild every 10K or so, modify the lifters or bores to get more oil to them at low rpm, or get lifters that do that for you. That being said a lot depends on the cam you're using. If it's a street roller, or mild to medium sized, you will not overload the axles very quickly. If you're putting 5-6K a season on it, you've got a while before you need to service the lifters. .680 is not much lift. but it's the duration and rate of lift that determines over-the-nose spring pressures and that's what wears out the lifters. I've got a couple solid rollers with street rollers that have gone 40K with no issues over 8+ years. But I run milder cam profiles that don't need huge spring pressures and I'll add I always bush the lifter bores which corrects the lifter-to-lobe alignment making sure the axle is evenly loaded.
When in doubt - get the lifters with the pressure fed axles. They will cause a drop in oil pressure, but your builder should have already compensated for larger clearances in regard to the oil delivery system.