Shooting 100grain broadhead
65lbs draw weight at 29.5" draw length
mathews monster mr8
Game will be whitetail, pigs, axis, blackbuck and fallow.

what do you experts suggeat

Not an expert so I suggest you go to the manufactures Web sites and look at the charts they provide for arrow selection. Having said that each chat will have a range of arrows that should fly well from your bow with your set up and that is the fun part do you want to shoot the fastest arrow you can which will be the lightest arrow in grains per inch (gpi) but it will also be the loudest out if your bow since it doesn't absorb as much energy as a heavier arrow. By extension the heavier arrow won't be as fast but should be significantly quieter.
To give you an idea I shoot my destroyer at 28.5"draw, 64lbs with Easton flatline arrows (very light 7.4gpi) gives me 301fps.
I don't know what your experience level is so if this is all too elementary please don't be insulted just trying to provide you some points of reference.
Just reread your post: I have no problems getting pass through on hogs with my set up but the longest shot has been 30yds, you might wasn't to lean towards the heavier arrows for African game.

Easton Axis.

I like the new carbon express maxima Reds.

Expensive but they work great.

Black Eagle Carnivore is a great arrow for the money. 100% carbon, all purpose hunting gives great speed, kinetic energy, and penetration. The Carnivore has exceptional durability.

I have shot these for years. Great arrow. You could also go with the Easton FMJ if your gonna do more pigs and axis. Tougher arrow but heavier and a bit more expensive.

I also shoot the Easton Axis (used to shoot Epics before they were discontinued). Love the Axis arrows though, cant go wrong with them.

Carbon Express 350

You can still get the Epics at www.camofire.com

I've been shooting Easton Axis since they came out. Never had a problem with not getting passthough on an animal. They are in MY opinion the best arrow out there for the money.

I shoot Bloodlines. So does a GA deer hunter IK.

Those are great as well.

Easton FMJ 11.3pgi!

Here's my suggestion. Grizzly Stik Momentum 330 penetrates like a APFDS round from a M1 TANK.I shoot mine out of a 64lb bow.

Get a universal size arrow... went down the axis road and even though they are good arrows I have 6 nocturnal knocks that I cant use now since the axis is a different size shaft... im shooting Carbon Zenth right now and they are good also but running into the same problems... but bought 6 carbon express that are working out well... besides all that my last arrows were some Easton's that I payed $30 a half dozen for and id buy them again if the stores weren't out of them...

Bloodsport impact hunters

I like the carbon express maxima blue streak 350 or maxima red 350

I've been using Easton Bloodlines for a couple of years with no problems.

Just for the heck of it, I'm gonna try some Black Eagle Carnivores in 2014.

I'm shooting Easton AxisST arrows. Haven't had a failure yet and can keep them inside 6" at 50 yards easily.