There is no "best" tank for chainvaping, it's not really good for many tanks. I'd also ask are you up for using temp control? If you are, chain vaping is going to be much more forgiving to your tank, as chainvaping is kind of what heats it up.
I also hesitate to recommend based on not enough information, honestly. Rebuildables are going to be less expensive if you chainvape than drop in tanks, but there do seem to be kind of outgoing sort of members of either class of tank that do extra well. If you go the rebuildable route, I would recommend rayon for your wicking material it withstands higher temps and holds up longer than cotton wicking. But there are some equally solid choices in the drop in arena should you wish to go that route. Rewicking and etc. can be a pain at times, but rebuildables overall are going to be less expensive.
I'm not going to recommend a tank because I don't even know what kind of vape you want. I will note, now that I have quite a few tanks in rotation, well, they hold up much better collectively than they would on an individual basis, because chain vaping is just deadly to coils, it really is, so doing what you can to keep temperatures down in your tank such as adding distilled water, using TC if that's an option for you, making sure you don't chainvape coil killing juices to start with (flavored, colored, super high VG, sweetened, naturally extracted tobaccos) and there are lots of other things you can do.
Best of luck,
Anna