Hi mate
I have a Trevally 80 and run 100lb threw it..the rod had plenty of lifting power but it quiet a soft rod,I used this last week on a trip and landed a big range of fish on it from red bass,coral trout to 15kg,barracudda,spanish,and GTs to 28kg on it..was throwing lures up to 170g and from poppers to stick baits..
I must say for tuna I recommend this rod and run 60lb or 80lb,you will love it and if you choose to fish 100lb then its a comfortable rod for it..A nice Priabolic fold for those fish which swim under the boat.
The infinity I have tossed and turned many times about as I have similar rods like it,a pretty powerfull stick I must say...