Hard.

[weaw]

Boost an offensive powers if You prefer counterattacking style. But not the Attack Power stat exactly. Devastating Power, Brute Force can be useful.
The Defense stat (including Crowd Pleaser skill) can be replaced by Grim Determination.
Unfortunately, these skills relate to Strength/Stamina/Size, but not to Agility/Presence.
But this gladiator has a good Size and already uses Strength/Size/Stamina-oriented skills. Like Shiled, SoTC, Armour Movement.
So, You may try to rise these stats a bit.
If You will use Grim Determination at 10 then the Shiled skill can be relplaced by the Master of Arms, which is more useful. Or You could decide to abandon the Shield at that time...

On the other hand, You may try to learn Bloody Spectacle or even Entangle. But these ways is much worse, in my opinion.

Also, try to use heaviest weapon for counterattacking. It's Falchion for exotics. And it's just funny. :) But a Trident is very useful too and, perhaps, more flexible.